22491579 has 8 divisors (see below), whose sum is σ = 32715072. Its totient is φ = 13631240.

The previous prime is 22491563. The next prime is 22491613. The reversal of 22491579 is 97519422.

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 22491579 - 2⁴ = 22491563 is a prime.

It is a super-2 number, since 2×22491579² = 1011742251826482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22491479) 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, 340749 + ... + 340814.

It is an arithmetic number, because the mean of its divisors is an integer number (4089384).

Almost surely, 2^22491579 is an apocalyptic number.

22491579 is a deficient number, since it is larger than the sum of its proper divisors (10223493).

22491579 is a wasteful number, since it uses less digits than its factorization.

22491579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681577.

The product of its digits is 45360, while the sum is 39.

The square root of 22491579 is about 4742.5287558432. The cubic root of 22491579 is about 282.2755844277.

It can be divided in two parts, 2249 and 1579, that added together give a triangular number (3828 = T₈₇).

The spelling of 22491579 in words is "twenty-two million, four hundred ninety-one thousand, five hundred seventy-nine".