40055631 has 32 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 20448480.

The previous prime is 40055597. The next prime is 40055633. The reversal of 40055631 is 13655004.

It is not a de Polignac number, because 40055631 - 2¹⁰ = 40054607 is a prime.

It is a super-2 number, since 2×40055631² = 3208907149616322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40055633) 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, 12160 + ... + 15098.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^40055631 is an apocalyptic number.

40055631 is a deficient number, since it is larger than the sum of its proper divisors (27681969).

40055631 is a wasteful number, since it uses less digits than its factorization.

40055631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 40055631 is about 6328.9518089491. The cubic root of 40055631 is about 342.1536620112.

The spelling of 40055631 in words is "forty million, fifty-five thousand, six hundred thirty-one".