22351257220 has 12 divisors (see below), whose sum is σ = 46937640204. Its totient is φ = 8940502880.

The previous prime is 22351257217. The next prime is 22351257241. The reversal of 22351257220 is 2275215322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15586523716 + 6764733504 = 124846^2 + 82248^2 .

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, 558781411 + ... + 558781450.

It is an arithmetic number, because the mean of its divisors is an integer number (3911470017).

Almost surely, 2^22351257220 is an apocalyptic number.

22351257220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22351257220 is an abundant number, since it is smaller than the sum of its proper divisors (24586382984).

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

22351257220 is a wasteful number, since it uses less digits than its factorization.

22351257220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117562870 (or 1117562868 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 22351257220 in words is "twenty-two billion, three hundred fifty-one million, two hundred fifty-seven thousand, two hundred twenty".