231288258 has 32 divisors (see below), whose sum is σ = 476173440. Its totient is φ = 74839680.

The previous prime is 231288223. The next prime is 231288293. The reversal of 231288258 is 852882132.

It is a happy number.

231288258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231288223) and next prime (231288293).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125403 + ... + 127233.

It is an arithmetic number, because the mean of its divisors is an integer number (14880420).

Almost surely, 2^231288258 is an apocalyptic number.

231288258 is an abundant number, since it is smaller than the sum of its proper divisors (244885182).

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

231288258 is a wasteful number, since it uses less digits than its factorization.

231288258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442.

The product of its digits is 61440, while the sum is 39.

The square root of 231288258 is about 15208.1641890137. The cubic root of 231288258 is about 613.8343602819.

The spelling of 231288258 in words is "two hundred thirty-one million, two hundred eighty-eight thousand, two hundred fifty-eight".