22515497457 has 4 divisors (see below), whose sum is σ = 30020663280. Its totient is φ = 15010331636.

The previous prime is 22515497449. The next prime is 22515497497. The reversal of 22515497457 is 75479451522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22515497457 - 2³ = 22515497449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22515497437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3752582907 + ... + 3752582912.

It is an arithmetic number, because the mean of its divisors is an integer number (7505165820).

Almost surely, 2^22515497457 is an apocalyptic number.

It is an amenable number.

22515497457 is a deficient number, since it is larger than the sum of its proper divisors (7505165823).

22515497457 is an equidigital number, since it uses as much as digits as its factorization.

22515497457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7505165822.

The product of its digits is 3528000, while the sum is 51.

The spelling of 22515497457 in words is "twenty-two billion, five hundred fifteen million, four hundred ninety-seven thousand, four hundred fifty-seven".