40545631 has 8 divisors (see below), whose sum is σ = 47324160. Its totient is φ = 34013688.

The previous prime is 40545623. The next prime is 40545647. The reversal of 40545631 is 13654504.

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 40545631 - 2³ = 40545623 is a prime.

It is a super-2 number, since 2×40545631² = 3287896386376322, 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 40545631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40545611) 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, 61291 + ... + 61948.

It is an arithmetic number, because the mean of its divisors is an integer number (5915520).

Almost surely, 2^40545631 is an apocalyptic number.

40545631 is a deficient number, since it is larger than the sum of its proper divisors (6778529).

40545631 is a wasteful number, since it uses less digits than its factorization.

40545631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123293.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 40545631 is about 6367.5451313673. The cubic root of 40545631 is about 343.5431983228.

The spelling of 40545631 in words is "forty million, five hundred forty-five thousand, six hundred thirty-one".