22213555412500 has 72 divisors (see below), whose sum is σ = 49902260972760. Its totient is φ = 8645275440000.

The previous prime is 22213555412441. The next prime is 22213555412507. The reversal of 22213555412500 is 521455531222.

It can be written as a sum of positive squares in 12 ways, for example, as 18042819363856 + 4170736048644 = 4247684^2 + 2042238^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 22213555412500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22213555412507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23552155 + ... + 24477154.

It is an arithmetic number, because the mean of its divisors is an integer number (693086957955).

Almost surely, 2^{22213555412500} is an apocalyptic number.

22213555412500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22213555412500 is an abundant number, since it is smaller than the sum of its proper divisors (27688705560260).

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

22213555412500 is an equidigital number, since it uses as much as digits as its factorization.

22213555412500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48029375 (or 48029353 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 22213555412500 in words is "twenty-two trillion, two hundred thirteen billion, five hundred fifty-five million, four hundred twelve thousand, five hundred".