131557757 has 4 divisors (see below), whose sum is σ = 132345696. Its totient is φ = 130769820.

The previous prime is 131557733. The next prime is 131557759. The reversal of 131557757 is 757755131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131557757 - 2¹² = 131553661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131557759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393719 + ... + 394052.

It is an arithmetic number, because the mean of its divisors is an integer number (33086424).

Almost surely, 2^131557757 is an apocalyptic number.

It is an amenable number.

131557757 is a deficient number, since it is larger than the sum of its proper divisors (787939).

131557757 is an equidigital number, since it uses as much as digits as its factorization.

131557757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787938.

The product of its digits is 128625, while the sum is 41.

The square root of 131557757 is about 11469.8629895915. The cubic root of 131557757 is about 508.5950786272.

The spelling of 131557757 in words is "one hundred thirty-one million, five hundred fifty-seven thousand, seven hundred fifty-seven".