22515131207 has 2 divisors, whose sum is σ = 22515131208. Its totient is φ = 22515131206.

The previous prime is 22515131173. The next prime is 22515131231. The reversal of 22515131207 is 70213151522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22515131207 - 2²⁴ = 22498353991 is a prime.

It is a super-2 number, since 2×22515131207² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22515131207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22515131407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257565603 + 11257565604.

It is an arithmetic number, because the mean of its divisors is an integer number (11257565604).

Almost surely, 2^22515131207 is an apocalyptic number.

22515131207 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515131207 is an equidigital number, since it uses as much as digits as its factorization.

22515131207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

Adding to 22515131207 its reverse (70213151522), we get a palindrome (92728282729).

The spelling of 22515131207 in words is "twenty-two billion, five hundred fifteen million, one hundred thirty-one thousand, two hundred seven".