231503120 has 40 divisors (see below), whose sum is σ = 540340416. Its totient is φ = 92240768.

The previous prime is 231503089. The next prime is 231503131. The reversal of 231503120 is 21305132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

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 7 ways as a sum of consecutive naturals, for example, 15539 + ... + 26541.

Almost surely, 2^231503120 is an apocalyptic number.

231503120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231503120 is an abundant number, since it is smaller than the sum of its proper divisors (308837296).

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

231503120 is a wasteful number, since it uses less digits than its factorization.

231503120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11279 (or 11273 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231503120 is about 15215.2265839191. The cubic root of 231503120 is about 614.0243812534.

Adding to 231503120 its reverse (21305132), we get a palindrome (252808252).

The spelling of 231503120 in words is "two hundred thirty-one million, five hundred three thousand, one hundred twenty".