22501493 has 4 divisors (see below), whose sum is σ = 25716000. Its totient is φ = 19286988.

The previous prime is 22501463. The next prime is 22501511. The reversal of 22501493 is 39410522.

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 not a de Polignac number, because 22501493 - 2²² = 18307189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501403) 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, 1607243 + ... + 1607256.

It is an arithmetic number, because the mean of its divisors is an integer number (6429000).

Almost surely, 2^22501493 is an apocalyptic number.

It is an amenable number.

22501493 is a deficient number, since it is larger than the sum of its proper divisors (3214507).

22501493 is an equidigital number, since it uses as much as digits as its factorization.

22501493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214506.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22501493 is about 4743.5738636602. The cubic root of 22501493 is about 282.3170528230.

The spelling of 22501493 in words is "twenty-two million, five hundred one thousand, four hundred ninety-three".