231016128 has 112 divisors (see below), whose sum is σ = 739713024. Its totient is φ = 62115840.

The previous prime is 231016127. The next prime is 231016129. The reversal of 231016128 is 821610132.

It is an interprime number because it is at equal distance from previous prime (231016127) and next prime (231016129).

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×231016128² = 106736902792224768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 231016098 and 231016107.

It is not an unprimeable number, because it can be changed into a prime (231016127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17793 + ... + 27903.

Almost surely, 2^231016128 is an apocalyptic number.

231016128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231016128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369856512).

231016128 is an abundant number, since it is smaller than the sum of its proper divisors (508696896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231016128 is a wasteful number, since it uses less digits than its factorization.

231016128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10150 (or 10140 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 231016128 is about 15199.2147165569. The cubic root of 231016128 is about 613.5935232963.

The spelling of 231016128 in words is "two hundred thirty-one million, sixteen thousand, one hundred twenty-eight".