40165031 has 4 divisors (see below), whose sum is σ = 42279000. Its totient is φ = 38051064.

The previous prime is 40165007. The next prime is 40165039. The reversal of 40165031 is 13056104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40165031 - 2¹⁸ = 39902887 is a prime.

It is a super-2 number, since 2×40165031² = 3226459430461922, 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 = 40164994 and 40165012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40165039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056956 + ... + 1056993.

It is an arithmetic number, because the mean of its divisors is an integer number (10569750).

Almost surely, 2^40165031 is an apocalyptic number.

40165031 is a deficient number, since it is larger than the sum of its proper divisors (2113969).

40165031 is a wasteful number, since it uses less digits than its factorization.

40165031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113968.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 40165031 is about 6337.5887370513. The cubic root of 40165031 is about 342.4648757203.

The spelling of 40165031 in words is "forty million, one hundred sixty-five thousand, thirty-one".