156133231 has 2 divisors, whose sum is σ = 156133232. Its totient is φ = 156133230.

The previous prime is 156133217. The next prime is 156133259. The reversal of 156133231 is 132331651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 156133231 - 2⁵ = 156133199 is a prime.

It is a super-2 number, since 2×156133231² = 48755171644998722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156133196 and 156133205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156133261) 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 as a sum of consecutive naturals, namely, 78066615 + 78066616.

It is an arithmetic number, because the mean of its divisors is an integer number (78066616).

Almost surely, 2^156133231 is an apocalyptic number.

156133231 is a deficient number, since it is larger than the sum of its proper divisors (1).

156133231 is an equidigital number, since it uses as much as digits as its factorization.

156133231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 25.

The square root of 156133231 is about 12495.3283670338. The cubic root of 156133231 is about 538.4744677727.

Adding to 156133231 its reverse (132331651), we get a palindrome (288464882).

The spelling of 156133231 in words is "one hundred fifty-six million, one hundred thirty-three thousand, two hundred thirty-one".