231135268 has 48 divisors (see below), whose sum is σ = 502838784. Its totient is φ = 90518400.

The previous prime is 231135253. The next prime is 231135269. The reversal of 231135268 is 862531132.

It is a super-2 number, since 2×231135268² = 106847024226863648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231135269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33621 + ... + 39907.

It is an arithmetic number, because the mean of its divisors is an integer number (10475808).

Almost surely, 2^231135268 is an apocalyptic number.

231135268 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 231135268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251419392).

231135268 is an abundant number, since it is smaller than the sum of its proper divisors (271703516).

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

231135268 is a wasteful number, since it uses less digits than its factorization.

231135268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6412 (or 6410 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 231135268 is about 15203.1334928034. The cubic root of 231135268 is about 613.6989863067.

The spelling of 231135268 in words is "two hundred thirty-one million, one hundred thirty-five thousand, two hundred sixty-eight".