131897351 has 4 divisors (see below), whose sum is σ = 131989704. Its totient is φ = 131805000.

The previous prime is 131897327. The next prime is 131897357. The reversal of 131897351 is 153798131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131897351 is a prime.

It is a super-2 number, since 2×131897351² = 34793822401634402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131897357) 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, 44000 + ... + 46901.

It is an arithmetic number, because the mean of its divisors is an integer number (32997426).

Almost surely, 2^131897351 is an apocalyptic number.

131897351 is a deficient number, since it is larger than the sum of its proper divisors (92353).

131897351 is an equidigital number, since it uses as much as digits as its factorization.

131897351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92352.

The product of its digits is 22680, while the sum is 38.

The square root of 131897351 is about 11484.6571999342. The cubic root of 131897351 is about 509.0323198857.

The spelling of 131897351 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, three hundred fifty-one".