131129157 has 4 divisors (see below), whose sum is σ = 174838880. Its totient is φ = 87419436.

The previous prime is 131129137. The next prime is 131129171. The reversal of 131129157 is 751921131.

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 de Polignac number, because none of the positive numbers 2^k-131129157 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 (131129137) 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, 21854857 + ... + 21854862.

It is an arithmetic number, because the mean of its divisors is an integer number (43709720).

Almost surely, 2^131129157 is an apocalyptic number.

It is an amenable number.

131129157 is a deficient number, since it is larger than the sum of its proper divisors (43709723).

131129157 is an equidigital number, since it uses as much as digits as its factorization.

131129157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43709722.

The product of its digits is 1890, while the sum is 30.

The square root of 131129157 is about 11451.1640019694. The cubic root of 131129157 is about 508.0421630431.

The spelling of 131129157 in words is "one hundred thirty-one million, one hundred twenty-nine thousand, one hundred fifty-seven".