231501120 has 112 divisors (see below), whose sum is σ = 740347008. Its totient is φ = 61286400.

The previous prime is 231501107. The next prime is 231501163. The reversal of 231501120 is 21105132.

It is a super-2 number, since 2×231501120² = 107185537122508800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 231501120.

It is a congruent number.

It is an unprimeable number.

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, 144162 + ... + 145758.

Almost surely, 2^231501120 is an apocalyptic number.

231501120 is a gapful number since it is divisible by the number (20) 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 231501120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370173504).

231501120 is an abundant number, since it is smaller than the sum of its proper divisors (508845888).

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

231501120 is a wasteful number, since it uses less digits than its factorization.

231501120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 231501120 is about 15215.1608601421. The cubic root of 231501120 is about 614.0226130234.

Adding to 231501120 its reverse (21105132), we get a palindrome (252606252).

The spelling of 231501120 in words is "two hundred thirty-one million, five hundred one thousand, one hundred twenty".