131525639 has 8 divisors (see below), whose sum is σ = 154377888. Its totient is φ = 109689120.

The previous prime is 131525627. The next prime is 131525659. The reversal of 131525639 is 936525131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131525639 - 2¹² = 131521543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131525599 and 131525608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131525659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253652 + ... + 254169.

It is an arithmetic number, because the mean of its divisors is an integer number (19297236).

Almost surely, 2^131525639 is an apocalyptic number.

131525639 is a deficient number, since it is larger than the sum of its proper divisors (22852249).

131525639 is an equidigital number, since it uses as much as digits as its factorization.

131525639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507865.

The product of its digits is 24300, while the sum is 35.

The square root of 131525639 is about 11468.4628002187. The cubic root of 131525639 is about 508.5536864493.

The spelling of 131525639 in words is "one hundred thirty-one million, five hundred twenty-five thousand, six hundred thirty-nine".