156345231 has 16 divisors (see below), whose sum is σ = 243104000. Its totient is φ = 89339544.

The previous prime is 156345227. The next prime is 156345251. The reversal of 156345231 is 132543651.

156345231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156345231 - 2² = 156345227 is a prime.

It is a super-2 number, since 2×156345231² = 48887662512886722, 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 (156345251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74941 + ... + 76998.

It is an arithmetic number, because the mean of its divisors is an integer number (15194000).

Almost surely, 2^156345231 is an apocalyptic number.

156345231 is a deficient number, since it is larger than the sum of its proper divisors (86758769).

156345231 is an equidigital number, since it uses as much as digits as its factorization.

156345231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151963 (or 151949 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 156345231 is about 12503.8086597644. The cubic root of 156345231 is about 538.7180737357.

Adding to 156345231 its reverse (132543651), we get a palindrome (288888882).

The spelling of 156345231 in words is "one hundred fifty-six million, three hundred forty-five thousand, two hundred thirty-one".