21552463122 has 32 divisors (see below), whose sum is σ = 45025846272. Its totient is φ = 6864651024.

The previous prime is 21552463069. The next prime is 21552463169. The reversal of 21552463122 is 22136425512.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52693 + ... + 214199.

It is an arithmetic number, because the mean of its divisors is an integer number (1407057696).

Almost surely, 2^21552463122 is an apocalyptic number.

21552463122 is an abundant number, since it is smaller than the sum of its proper divisors (23473383150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21552463122 is a wasteful number, since it uses less digits than its factorization.

21552463122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162502.

The product of its digits is 28800, while the sum is 33.

Adding to 21552463122 its reverse (22136425512), we get a palindrome (43688888634).

The spelling of 21552463122 in words is "twenty-one billion, five hundred fifty-two million, four hundred sixty-three thousand, one hundred twenty-two".