131525401 has 4 divisors (see below), whose sum is σ = 150314752. Its totient is φ = 112736052.

The previous prime is 131525351. The next prime is 131525423. The reversal of 131525401 is 104525131.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104525131 = 43 ⋅2430817.

It is a cyclic number.

It is not a de Polignac number, because 131525401 - 2¹⁹ = 131001113 is a prime.

It is a super-2 number, since 2×131525401² = 34597862216421602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131522401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9394665 + ... + 9394678.

It is an arithmetic number, because the mean of its divisors is an integer number (37578688).

Almost surely, 2^131525401 is an apocalyptic number.

It is an amenable number.

131525401 is a deficient number, since it is larger than the sum of its proper divisors (18789351).

131525401 is an equidigital number, since it uses as much as digits as its factorization.

131525401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18789350.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 131525401 is about 11468.4524239324. The cubic root of 131525401 is about 508.5533797009.

The spelling of 131525401 in words is "one hundred thirty-one million, five hundred twenty-five thousand, four hundred one".