40663531 has 8 divisors (see below), whose sum is σ = 41186880. Its totient is φ = 40143048.

The previous prime is 40663523. The next prime is 40663543. The reversal of 40663531 is 13536604.

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

It is a cyclic number.

It is not a de Polignac number, because 40663531 - 2³ = 40663523 is a prime.

It is a super-2 number, since 2×40663531² = 3307045506775922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40663531.

It is not an unprimeable number, because it can be changed into a prime (40663631) 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, 44380 + ... + 45286.

It is an arithmetic number, because the mean of its divisors is an integer number (5148360).

Almost surely, 2^40663531 is an apocalyptic number.

40663531 is a deficient number, since it is larger than the sum of its proper divisors (523349).

40663531 is a wasteful number, since it uses less digits than its factorization.

40663531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 40663531 is about 6376.7962959467. The cubic root of 40663531 is about 343.8758650490.

The spelling of 40663531 in words is "forty million, six hundred sixty-three thousand, five hundred thirty-one".