131539201 has 4 divisors (see below), whose sum is σ = 131870932. Its totient is φ = 131207472.

The previous prime is 131539171. The next prime is 131539237. The reversal of 131539201 is 102935131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45495025 + 86044176 = 6745^2 + 9276^2 .

It is a cyclic number.

It is not a de Polignac number, because 131539201 - 2⁹ = 131538689 is a prime.

It is a super-2 number, since 2×131539201² = 34605122799436802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131539301) 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, 165270 + ... + 166063.

It is an arithmetic number, because the mean of its divisors is an integer number (32967733).

Almost surely, 2^131539201 is an apocalyptic number.

It is an amenable number.

131539201 is a deficient number, since it is larger than the sum of its proper divisors (331731).

131539201 is an equidigital number, since it uses as much as digits as its factorization.

131539201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331730.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 131539201 is about 11469.0540586397. The cubic root of 131539201 is about 508.5711653432.

The spelling of 131539201 in words is "one hundred thirty-one million, five hundred thirty-nine thousand, two hundred one".