231500255 has 12 divisors (see below), whose sum is σ = 323155800. Its totient is φ = 158742864.

The previous prime is 231500249. The next prime is 231500263. The reversal of 231500255 is 552005132.

It is not a de Polignac number, because 231500255 - 2¹⁴ = 231483871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231500255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472205 + ... + 472694.

It is an arithmetic number, because the mean of its divisors is an integer number (26929650).

Almost surely, 2^231500255 is an apocalyptic number.

231500255 is a deficient number, since it is larger than the sum of its proper divisors (91655545).

231500255 is an equidigital number, since it uses as much as digits as its factorization.

231500255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944918 (or 944911 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 231500255 is about 15215.1324345206. The cubic root of 231500255 is about 614.0218482607.

Adding to 231500255 its reverse (552005132), we get a palindrome (783505387).

The spelling of 231500255 in words is "two hundred thirty-one million, five hundred thousand, two hundred fifty-five".