40025631 has 8 divisors (see below), whose sum is σ = 53467264. Its totient is φ = 26633880.

The previous prime is 40025627. The next prime is 40025639. The reversal of 40025631 is 13652004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40025631 - 2² = 40025627 is a prime.

It is a super-2 number, since 2×40025631² = 3204102273896322, 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 = 40025598 and 40025607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40025639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10555 + ... + 13836.

It is an arithmetic number, because the mean of its divisors is an integer number (6683408).

Almost surely, 2^40025631 is an apocalyptic number.

40025631 is a deficient number, since it is larger than the sum of its proper divisors (13441633).

40025631 is a wasteful number, since it uses less digits than its factorization.

40025631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24941.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40025631 is about 6326.5813043065. The cubic root of 40025631 is about 342.0682210611.

Adding to 40025631 its reverse (13652004), we get a palindrome (53677635).

The spelling of 40025631 in words is "forty million, twenty-five thousand, six hundred thirty-one".