131031625 has 32 divisors (see below), whose sum is σ = 168854400. Its totient is φ = 101476800.

The previous prime is 131031623. The next prime is 131031647. The reversal of 131031625 is 526130131.

It is a happy number.

It is not a de Polignac number, because 131031625 - 2¹ = 131031623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131031596 and 131031605.

It is not an unprimeable number, because it can be changed into a prime (131031623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 803794 + ... + 803956.

It is an arithmetic number, because the mean of its divisors is an integer number (5276700).

Almost surely, 2^131031625 is an apocalyptic number.

It is an amenable number.

131031625 is a deficient number, since it is larger than the sum of its proper divisors (37822775).

131031625 is a wasteful number, since it uses less digits than its factorization.

131031625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 131031625 is about 11446.9046034288. The cubic root of 131031625 is about 507.9161736257.

Adding to 131031625 its reverse (526130131), we get a palindrome (657161756).

The spelling of 131031625 in words is "one hundred thirty-one million, thirty-one thousand, six hundred twenty-five".