22508157 has 8 divisors (see below), whose sum is σ = 34298176. Its totient is φ = 12861792.

The previous prime is 22508137. The next prime is 22508203. The reversal of 22508157 is 75180522.

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

It is not a de Polignac number, because 22508157 - 2¹¹ = 22506109 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 (22508107) 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, 535888 + ... + 535929.

It is an arithmetic number, because the mean of its divisors is an integer number (4287272).

Almost surely, 2^22508157 is an apocalyptic number.

It is an amenable number.

22508157 is a deficient number, since it is larger than the sum of its proper divisors (11790019).

22508157 is a wasteful number, since it uses less digits than its factorization.

22508157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071827.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 22508157 is about 4744.2762356338. The cubic root of 22508157 is about 282.3449202353.

Adding to 22508157 its reverse (75180522), we get a palindrome (97688679).

The spelling of 22508157 in words is "twenty-two million, five hundred eight thousand, one hundred fifty-seven".