22620157 has 4 divisors (see below), whose sum is σ = 25851616. Its totient is φ = 19388700.

The previous prime is 22620133. The next prime is 22620161. The reversal of 22620157 is 75102622.

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-22620157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22620167) 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, 1615719 + ... + 1615732.

It is an arithmetic number, because the mean of its divisors is an integer number (6462904).

Almost surely, 2^22620157 is an apocalyptic number.

It is an amenable number.

22620157 is a deficient number, since it is larger than the sum of its proper divisors (3231459).

22620157 is an equidigital number, since it uses as much as digits as its factorization.

22620157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231458.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 22620157 is about 4756.0652855065. The cubic root of 22620157 is about 282.8124592473.

Adding to 22620157 its reverse (75102622), we get a palindrome (97722779).

The spelling of 22620157 in words is "twenty-two million, six hundred twenty thousand, one hundred fifty-seven".