22515004231 has 2 divisors, whose sum is σ = 22515004232. Its totient is φ = 22515004230.

The previous prime is 22515004201. The next prime is 22515004247. The reversal of 22515004231 is 13240051522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22515004231 - 2⁷ = 22515004103 is a prime.

It is a super-2 number, since 2×22515004231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22515004196 and 22515004205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22515004201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257502115 + 11257502116.

It is an arithmetic number, because the mean of its divisors is an integer number (11257502116).

Almost surely, 2^22515004231 is an apocalyptic number.

22515004231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515004231 is an equidigital number, since it uses as much as digits as its factorization.

22515004231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 22515004231 its reverse (13240051522), we get a palindrome (35755055753).

The spelling of 22515004231 in words is "twenty-two billion, five hundred fifteen million, four thousand, two hundred thirty-one".