40165321 has 8 divisors (see below), whose sum is σ = 46013184. Its totient is φ = 34344960.

The previous prime is 40165309. The next prime is 40165331. The reversal of 40165321 is 12356104.

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 40165321 - 2⁵ = 40165289 is a prime.

It is a super-2 number, since 2×40165321² = 3226506022066082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40165292 and 40165301.

It is not an unprimeable number, because it can be changed into a prime (40165331) 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, 3640 + ... + 9673.

It is an arithmetic number, because the mean of its divisors is an integer number (5751648).

Almost surely, 2^40165321 is an apocalyptic number.

It is an amenable number.

40165321 is a deficient number, since it is larger than the sum of its proper divisors (5847863).

40165321 is a wasteful number, since it uses less digits than its factorization.

40165321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40165321 is about 6337.6116163741. The cubic root of 40165321 is about 342.4656999412.

The spelling of 40165321 in words is "forty million, one hundred sixty-five thousand, three hundred twenty-one".