22015220555 has 16 divisors (see below), whose sum is σ = 27717535488. Its totient is φ = 16764624000.

The previous prime is 22015220533. The next prime is 22015220567. The reversal of 22015220555 is 55502251022.

It is not a de Polignac number, because 22015220555 - 2⁸ = 22015220299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1154756 + ... + 1173665.

It is an arithmetic number, because the mean of its divisors is an integer number (1732345968).

Almost surely, 2^22015220555 is an apocalyptic number.

22015220555 is a deficient number, since it is larger than the sum of its proper divisors (5702314933).

22015220555 is a wasteful number, since it uses less digits than its factorization.

22015220555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328518.

The product of its (nonzero) digits is 10000, while the sum is 29.

Adding to 22015220555 its reverse (55502251022), we get a palindrome (77517471577).

The spelling of 22015220555 in words is "twenty-two billion, fifteen million, two hundred twenty thousand, five hundred fifty-five".