155655131 has 2 divisors, whose sum is σ = 155655132. Its totient is φ = 155655130.

The previous prime is 155655109. The next prime is 155655167. The reversal of 155655131 is 131556551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155655131 is a prime.

It is a super-2 number, since 2×155655131² = 48457039613254322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155675131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77827565 + 77827566.

It is an arithmetic number, because the mean of its divisors is an integer number (77827566).

Almost surely, 2^155655131 is an apocalyptic number.

155655131 is a deficient number, since it is larger than the sum of its proper divisors (1).

155655131 is an equidigital number, since it uses as much as digits as its factorization.

155655131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 32.

The square root of 155655131 is about 12476.1825491614. The cubic root of 155655131 is about 537.9242798221.

The spelling of 155655131 in words is "one hundred fifty-five million, six hundred fifty-five thousand, one hundred thirty-one".