22521412157 has 2 divisors, whose sum is σ = 22521412158. Its totient is φ = 22521412156.

The previous prime is 22521412073. The next prime is 22521412169. The reversal of 22521412157 is 75121412522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20569009561 + 1952402596 = 143419^2 + 44186^2 .

It is a cyclic number.

It is not a de Polignac number, because 22521412157 - 2⁸ = 22521411901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22521412057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260706078 + 11260706079.

It is an arithmetic number, because the mean of its divisors is an integer number (11260706079).

Almost surely, 2^22521412157 is an apocalyptic number.

It is an amenable number.

22521412157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22521412157 is an equidigital number, since it uses as much as digits as its factorization.

22521412157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 32.

Adding to 22521412157 its reverse (75121412522), we get a palindrome (97642824679).

The spelling of 22521412157 in words is "twenty-two billion, five hundred twenty-one million, four hundred twelve thousand, one hundred fifty-seven".