131957951 has 4 divisors (see below), whose sum is σ = 131995512. Its totient is φ = 131920392.

The previous prime is 131957909. The next prime is 131957993. The reversal of 131957951 is 159759131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159759131 = 7 ⋅22822733.

It is an interprime number because it is at equal distance from previous prime (131957909) and next prime (131957993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131957951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131957899 and 131957908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131957051) 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, 12896 + ... + 20741.

It is an arithmetic number, because the mean of its divisors is an integer number (32998878).

Almost surely, 2^131957951 is an apocalyptic number.

131957951 is a deficient number, since it is larger than the sum of its proper divisors (37561).

131957951 is an equidigital number, since it uses as much as digits as its factorization.

131957951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37560.

The product of its digits is 42525, while the sum is 41.

The square root of 131957951 is about 11487.2951994802. The cubic root of 131957951 is about 509.1102659432.

The spelling of 131957951 in words is "one hundred thirty-one million, nine hundred fifty-seven thousand, nine hundred fifty-one".