155072831 has 12 divisors (see below), whose sum is σ = 167608272. Its totient is φ = 143197824.

The previous prime is 155072803. The next prime is 155072837. The reversal of 155072831 is 138270551.

It is a de Polignac number, because none of the positive numbers 2^k-155072831 is a prime.

It is a super-2 number, since 2×155072831² = 48095165828709122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155072837) 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 11 ways as a sum of consecutive naturals, for example, 15335 + ... + 23351.

It is an arithmetic number, because the mean of its divisors is an integer number (13967356).

Almost surely, 2^155072831 is an apocalyptic number.

155072831 is a deficient number, since it is larger than the sum of its proper divisors (12535441).

155072831 is an equidigital number, since it uses as much as digits as its factorization.

155072831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098 (or 8069 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 155072831 is about 12452.8242178230. The cubic root of 155072831 is about 537.2526567754.

The spelling of 155072831 in words is "one hundred fifty-five million, seventy-two thousand, eight hundred thirty-one".