131520351 has 4 divisors (see below), whose sum is σ = 175360472. Its totient is φ = 87680232.

The previous prime is 131520343. The next prime is 131520419. The reversal of 131520351 is 153025131.

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

It is not a de Polignac number, because 131520351 - 2³ = 131520343 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 (131520341) 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, 21920056 + ... + 21920061.

It is an arithmetic number, because the mean of its divisors is an integer number (43840118).

Almost surely, 2^131520351 is an apocalyptic number.

131520351 is a deficient number, since it is larger than the sum of its proper divisors (43840121).

131520351 is an equidigital number, since it uses as much as digits as its factorization.

131520351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43840120.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131520351 is about 11468.2322526185. The cubic root of 131520351 is about 508.5468708759.

Adding to 131520351 its reverse (153025131), we get a palindrome (284545482).

The spelling of 131520351 in words is "one hundred thirty-one million, five hundred twenty thousand, three hundred fifty-one".