22516023157 has 4 divisors (see below), whose sum is σ = 22516662636. Its totient is φ = 22515383680.

The previous prime is 22516023119. The next prime is 22516023163. The reversal of 22516023157 is 75132061522.

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 5125271281 + 17390751876 = 71591^2 + 131874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22516023157 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 (22516023107) 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, 263644 + ... + 338437.

It is an arithmetic number, because the mean of its divisors is an integer number (5629165659).

Almost surely, 2^22516023157 is an apocalyptic number.

It is an amenable number.

22516023157 is a deficient number, since it is larger than the sum of its proper divisors (639479).

22516023157 is an equidigital number, since it uses as much as digits as its factorization.

22516023157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639478.

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 22516023157 its reverse (75132061522), we get a palindrome (97648084679).

The spelling of 22516023157 in words is "twenty-two billion, five hundred sixteen million, twenty-three thousand, one hundred fifty-seven".