22515015455 has 4 divisors (see below), whose sum is σ = 27018018552. Its totient is φ = 18012012360.

The previous prime is 22515015421. The next prime is 22515015463. The reversal of 22515015455 is 55451051522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22515015455 - 2²⁴ = 22498238239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251501541 + ... + 2251501550.

It is an arithmetic number, because the mean of its divisors is an integer number (6754504638).

Almost surely, 2^22515015455 is an apocalyptic number.

22515015455 is a deficient number, since it is larger than the sum of its proper divisors (4503003097).

22515015455 is an equidigital number, since it uses as much as digits as its factorization.

22515015455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503003096.

The product of its (nonzero) digits is 50000, while the sum is 35.

Adding to 22515015455 its reverse (55451051522), we get a palindrome (77966066977).

The spelling of 22515015455 in words is "twenty-two billion, five hundred fifteen million, fifteen thousand, four hundred fifty-five".