22138621 has 8 divisors (see below), whose sum is σ = 22555584. Its totient is φ = 21725760.

The previous prime is 22138583. The next prime is 22138631. The reversal of 22138621 is 12683122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22138621 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 (22138631) 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, 11176 + ... + 13006.

It is an arithmetic number, because the mean of its divisors is an integer number (2819448).

Almost surely, 2^22138621 is an apocalyptic number.

It is an amenable number.

22138621 is a deficient number, since it is larger than the sum of its proper divisors (416963).

22138621 is a wasteful number, since it uses less digits than its factorization.

22138621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051.

The product of its digits is 1152, while the sum is 25.

The square root of 22138621 is about 4705.1696037444. The cubic root of 22138621 is about 280.7912187158.

The spelling of 22138621 in words is "twenty-two million, one hundred thirty-eight thousand, six hundred twenty-one".