131274581 has 2 divisors, whose sum is σ = 131274582. Its totient is φ = 131274580.

The previous prime is 131274551. The next prime is 131274589. The reversal of 131274581 is 185472131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75099556 + 56175025 = 8666^2 + 7495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131274581 is a prime.

It is a super-2 number, since 2×131274581² = 34466031233451122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131274589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65637290 + 65637291.

It is an arithmetic number, because the mean of its divisors is an integer number (65637291).

Almost surely, 2^131274581 is an apocalyptic number.

It is an amenable number.

131274581 is a deficient number, since it is larger than the sum of its proper divisors (1).

131274581 is an equidigital number, since it uses as much as digits as its factorization.

131274581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 32.

The square root of 131274581 is about 11457.5119899566. The cubic root of 131274581 is about 508.2299021907.

The spelling of 131274581 in words is "one hundred thirty-one million, two hundred seventy-four thousand, five hundred eighty-one".