156441331 has 4 divisors (see below), whose sum is σ = 163243152. Its totient is φ = 149639512.

The previous prime is 156441323. The next prime is 156441343. The reversal of 156441331 is 133144651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133144651 = 59 ⋅2256689.

It is a cyclic number.

It is not a de Polignac number, because 156441331 - 2³ = 156441323 is a prime.

It is a super-2 number, since 2×156441331² = 48947780090103122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156441331.

It is not an unprimeable number, because it can be changed into a prime (156441301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400876 + ... + 3400921.

It is an arithmetic number, because the mean of its divisors is an integer number (40810788).

Almost surely, 2^156441331 is an apocalyptic number.

156441331 is a deficient number, since it is larger than the sum of its proper divisors (6801821).

156441331 is an equidigital number, since it uses as much as digits as its factorization.

156441331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801820.

The product of its digits is 4320, while the sum is 28.

The square root of 156441331 is about 12507.6508985501. The cubic root of 156441331 is about 538.8284282440.

Adding to 156441331 its reverse (133144651), we get a palindrome (289585982).

The spelling of 156441331 in words is "one hundred fifty-six million, four hundred forty-one thousand, three hundred thirty-one".