155364631 has 2 divisors, whose sum is σ = 155364632. Its totient is φ = 155364630.

The previous prime is 155364623. The next prime is 155364637. The reversal of 155364631 is 136463551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155364631 - 2³ = 155364623 is a prime.

It is a super-2 number, since 2×155364631² = 48276337131532322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155364637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77682315 + 77682316.

It is an arithmetic number, because the mean of its divisors is an integer number (77682316).

Almost surely, 2^155364631 is an apocalyptic number.

155364631 is a deficient number, since it is larger than the sum of its proper divisors (1).

155364631 is an equidigital number, since it uses as much as digits as its factorization.

155364631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 155364631 is about 12464.5349291500. The cubic root of 155364631 is about 537.5894277741.

The spelling of 155364631 in words is "one hundred fifty-five million, three hundred sixty-four thousand, six hundred thirty-one".