131155331 has 2 divisors, whose sum is σ = 131155332. Its totient is φ = 131155330.

The previous prime is 131155319. The next prime is 131155369. The reversal of 131155331 is 133551131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131155331 - 2¹⁴ = 131138947 is a prime.

It is a super-2 number, since 2×131155331² = 34403441699439122, which contains 22 as substring.

It is equal to p_7440044 and since 131155331 and 7440044 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 131155297 and 131155306.

It is not a weakly prime, because it can be changed into another prime (131155301) 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, 65577665 + 65577666.

It is an arithmetic number, because the mean of its divisors is an integer number (65577666).

Almost surely, 2^131155331 is an apocalyptic number.

131155331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131155331 is an equidigital number, since it uses as much as digits as its factorization.

131155331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 675, while the sum is 23.

The square root of 131155331 is about 11452.3067981957. The cubic root of 131155331 is about 508.0759633339.

The spelling of 131155331 in words is "one hundred thirty-one million, one hundred fifty-five thousand, three hundred thirty-one".