155976131 has 2 divisors, whose sum is σ = 155976132. Its totient is φ = 155976130.

The previous prime is 155976113. The next prime is 155976143. The reversal of 155976131 is 131679551.

Together with previous prime (155976113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155976131 - 2¹⁴ = 155959747 is a prime.

It is a super-2 number, since 2×155976131² = 48657106883458322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155976631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77988065 + 77988066.

It is an arithmetic number, because the mean of its divisors is an integer number (77988066).

Almost surely, 2^155976131 is an apocalyptic number.

155976131 is a deficient number, since it is larger than the sum of its proper divisors (1).

155976131 is an equidigital number, since it uses as much as digits as its factorization.

155976131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 155976131 is about 12489.0404355179. The cubic root of 155976131 is about 538.2938042737.

The spelling of 155976131 in words is "one hundred fifty-five million, nine hundred seventy-six thousand, one hundred thirty-one".