125355531 has 16 divisors (see below), whose sum is σ = 191752704. Its totient is φ = 71356224.

The previous prime is 125355511. The next prime is 125355539. The reversal of 125355531 is 135553521.

It is not a de Polignac number, because 125355531 - 2⁵ = 125355499 is a prime.

It is a super-2 number, since 2×125355531² = 31428018304583922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125355539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5826 + ... + 16871.

It is an arithmetic number, because the mean of its divisors is an integer number (11984544).

Almost surely, 2^125355531 is an apocalyptic number.

125355531 is a deficient number, since it is larger than the sum of its proper divisors (66397173).

125355531 is a wasteful number, since it uses less digits than its factorization.

125355531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22970.

The product of its digits is 11250, while the sum is 30.

The square root of 125355531 is about 11196.2284274661. The cubic root of 125355531 is about 500.4735926118.

The spelling of 125355531 in words is "one hundred twenty-five million, three hundred fifty-five thousand, five hundred thirty-one".