22491373 has 4 divisors (see below), whose sum is σ = 22799548. Its totient is φ = 22183200.

The previous prime is 22491367. The next prime is 22491409. The reversal of 22491373 is 37319422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5697769 + 16793604 = 2387^2 + 4098^2 .

It is a cyclic number.

It is not a de Polignac number, because 22491373 - 2⁵ = 22491341 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 (22491473) 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, 153978 + ... + 154123.

It is an arithmetic number, because the mean of its divisors is an integer number (5699887).

Almost surely, 2^22491373 is an apocalyptic number.

It is an amenable number.

22491373 is a deficient number, since it is larger than the sum of its proper divisors (308175).

22491373 is an equidigital number, since it uses as much as digits as its factorization.

22491373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308174.

The product of its digits is 9072, while the sum is 31.

The square root of 22491373 is about 4742.5070374223. The cubic root of 22491373 is about 282.2747226393.

The spelling of 22491373 in words is "twenty-two million, four hundred ninety-one thousand, three hundred seventy-three".