131525434 has 4 divisors (see below), whose sum is σ = 197288154. Its totient is φ = 65762716.

The previous prime is 131525423. The next prime is 131525437. The reversal of 131525434 is 434525131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434525131 = 23 ⋅18892397.

It can be written as a sum of positive squares in only one way, i.e., 86434209 + 45091225 = 9297^2 + 6715^2 .

It is not an unprimeable number, because it can be changed into a prime (131525437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32881357 + ... + 32881360.

Almost surely, 2^131525434 is an apocalyptic number.

131525434 is a deficient number, since it is larger than the sum of its proper divisors (65762720).

131525434 is an equidigital number, since it uses as much as digits as its factorization.

131525434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65762719.

The product of its digits is 7200, while the sum is 28.

The square root of 131525434 is about 11468.4538626617. The cubic root of 131525434 is about 508.5534222333.

The spelling of 131525434 in words is "one hundred thirty-one million, five hundred twenty-five thousand, four hundred thirty-four".