156223631 has 2 divisors, whose sum is σ = 156223632. Its totient is φ = 156223630.

The previous prime is 156223619. The next prime is 156223637. The reversal of 156223631 is 136322651.

It is a strong prime.

It is an emirp because it is prime and its reverse (136322651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156223631 is a prime.

It is a super-2 number, since 2×156223631² = 48811645765648322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 156223594 and 156223603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156223637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78111815 + 78111816.

It is an arithmetic number, because the mean of its divisors is an integer number (78111816).

Almost surely, 2^156223631 is an apocalyptic number.

156223631 is a deficient number, since it is larger than the sum of its proper divisors (1).

156223631 is an equidigital number, since it uses as much as digits as its factorization.

156223631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 156223631 is about 12498.9451954955. The cubic root of 156223631 is about 538.5783719829.

The spelling of 156223631 in words is "one hundred fifty-six million, two hundred twenty-three thousand, six hundred thirty-one".