22515660451 has 2 divisors, whose sum is σ = 22515660452. Its totient is φ = 22515660450.

The previous prime is 22515660439. The next prime is 22515660469. The reversal of 22515660451 is 15406651522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22515660451 - 2⁹ = 22515659939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22515660451.

It is not a weakly prime, because it can be changed into another prime (22515660481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257830225 + 11257830226.

It is an arithmetic number, because the mean of its divisors is an integer number (11257830226).

Almost surely, 2^22515660451 is an apocalyptic number.

22515660451 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515660451 is an equidigital number, since it uses as much as digits as its factorization.

22515660451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 22515660451 in words is "twenty-two billion, five hundred fifteen million, six hundred sixty thousand, four hundred fifty-one".