258155231 has 4 divisors (see below), whose sum is σ = 258455232. Its totient is φ = 257855232.

The previous prime is 258155207. The next prime is 258155237. The reversal of 258155231 is 132551852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258155231 is a prime.

It is a super-2 number, since 2×258155231² = 133288246585326722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258155237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148706 + ... + 150431.

It is an arithmetic number, because the mean of its divisors is an integer number (64613808).

Almost surely, 2^258155231 is an apocalyptic number.

258155231 is a deficient number, since it is larger than the sum of its proper divisors (300001).

258155231 is an equidigital number, since it uses as much as digits as its factorization.

258155231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300000.

The product of its digits is 12000, while the sum is 32.

The square root of 258155231 is about 16067.2098075553. The cubic root of 258155231 is about 636.7373268736.

The spelling of 258155231 in words is "two hundred fifty-eight million, one hundred fifty-five thousand, two hundred thirty-one".