131407157 has 4 divisors (see below), whose sum is σ = 150179616. Its totient is φ = 112634700.

The previous prime is 131407153. The next prime is 131407163. The reversal of 131407157 is 751704131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751704131 = 827 ⋅908953.

It is a cyclic number.

It is not a de Polignac number, because 131407157 - 2² = 131407153 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 (131407153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9386219 + ... + 9386232.

It is an arithmetic number, because the mean of its divisors is an integer number (37544904).

Almost surely, 2^131407157 is an apocalyptic number.

It is an amenable number.

131407157 is a deficient number, since it is larger than the sum of its proper divisors (18772459).

131407157 is an equidigital number, since it uses as much as digits as its factorization.

131407157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772458.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 131407157 is about 11463.2960792261. The cubic root of 131407157 is about 508.4009340776.

The spelling of 131407157 in words is "one hundred thirty-one million, four hundred seven thousand, one hundred fifty-seven".