125151631 has 12 divisors (see below), whose sum is σ = 138994576. Its totient is φ = 112590720.

The previous prime is 125151601. The next prime is 125151641. The reversal of 125151631 is 136151521.

It is a happy number.

It is not a de Polignac number, because 125151631 - 2⁵ = 125151599 is a prime.

It is a super-2 number, since 2×125151631² = 31325861483920322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125151596 and 125151605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125151601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6406 + ... + 17068.

Almost surely, 2^125151631 is an apocalyptic number.

125151631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125151631 is a deficient number, since it is larger than the sum of its proper divisors (13842945).

125151631 is a wasteful number, since it uses less digits than its factorization.

125151631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10782 (or 10771 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 125151631 is about 11187.1189767518. The cubic root of 125151631 is about 500.2020929725.

The spelling of 125151631 in words is "one hundred twenty-five million, one hundred fifty-one thousand, six hundred thirty-one".