40625631 has 40 divisors (see below), whose sum is σ = 65008944. Its totient is φ = 25194240.

The previous prime is 40625621. The next prime is 40625633. The reversal of 40625631 is 13652604.

40625631 is a `hidden beast` number, since 4 + 0 + 6 + 25 + 631 = 666.

It is not a de Polignac number, because 40625631 - 2⁹ = 40625119 is a prime.

It is a super-2 number, since 2×40625631² = 3300883788296322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40625595 and 40625604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40625633) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 224361 + ... + 224541.

Almost surely, 2^40625631 is an apocalyptic number.

40625631 is a deficient number, since it is larger than the sum of its proper divisors (24383313).

40625631 is a wasteful number, since it uses less digits than its factorization.

40625631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40625631 is about 6373.8238915113. The cubic root of 40625631 is about 343.7689965920.

The spelling of 40625631 in words is "forty million, six hundred twenty-five thousand, six hundred thirty-one".