40221517 has 4 divisors (see below), whose sum is σ = 45967456. Its totient is φ = 34475580.

The previous prime is 40221487. The next prime is 40221523. The reversal of 40221517 is 71512204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221557) 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, 2872959 + ... + 2872972.

It is an arithmetic number, because the mean of its divisors is an integer number (11491864).

Almost surely, 2^40221517 is an apocalyptic number.

It is an amenable number.

40221517 is a deficient number, since it is larger than the sum of its proper divisors (5745939).

40221517 is an equidigital number, since it uses as much as digits as its factorization.

40221517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745938.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 40221517 is about 6342.0435980841. The cubic root of 40221517 is about 342.6253420863.

The spelling of 40221517 in words is "forty million, two hundred twenty-one thousand, five hundred seventeen".