131135025 has 72 divisors (see below), whose sum is σ = 267170400. Its totient is φ = 56394240.

The previous prime is 131135009. The next prime is 131135033. The reversal of 131135025 is 520531131.

It is not a de Polignac number, because 131135025 - 2⁴ = 131135009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 131134992 and 131135010.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 61426 + ... + 63524.

It is an arithmetic number, because the mean of its divisors is an integer number (3710700).

Almost surely, 2^131135025 is an apocalyptic number.

131135025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131135025 is an abundant number, since it is smaller than the sum of its proper divisors (136035375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131135025 is a wasteful number, since it uses less digits than its factorization.

131135025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143 (or 2131 counting only the distinct ones).

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

The square root of 131135025 is about 11451.4202175975. The cubic root of 131135025 is about 508.0497411872.

Adding to 131135025 its reverse (520531131), we get a palindrome (651666156).

The spelling of 131135025 in words is "one hundred thirty-one million, one hundred thirty-five thousand, twenty-five".