40265631 has 12 divisors (see below), whose sum is σ = 66470352. Its totient is φ = 23008896.

The previous prime is 40265627. The next prime is 40265677. The reversal of 40265631 is 13656204.

40265631 is a `hidden beast` number, since 4 + 0 + 2 + 656 + 3 + 1 = 666.

It is not a de Polignac number, because 40265631 - 2² = 40265627 is a prime.

It is a super-2 number, since 2×40265631² = 3242642079656322, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 40265595 and 40265604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40265681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319506 + ... + 319631.

It is an arithmetic number, because the mean of its divisors is an integer number (5539196).

Almost surely, 2^40265631 is an apocalyptic number.

40265631 is a deficient number, since it is larger than the sum of its proper divisors (26204721).

40265631 is a wasteful number, since it uses less digits than its factorization.

40265631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639150 (or 639147 counting only the distinct ones).

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

The square root of 40265631 is about 6345.5205460230. The cubic root of 40265631 is about 342.7505574194.

The spelling of 40265631 in words is "forty million, two hundred sixty-five thousand, six hundred thirty-one".