22251512100 has 36 divisors (see below), whose sum is σ = 64381042544. Its totient is φ = 5933736480.

The previous prime is 22251512089. The next prime is 22251512113. The reversal of 22251512100 is 121515222.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37085554 + ... + 37086153.

Almost surely, 2^22251512100 is an apocalyptic number.

22251512100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22251512100 is an abundant number, since it is smaller than the sum of its proper divisors (42129530444).

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

22251512100 is a wasteful number, since it uses less digits than its factorization.

22251512100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74171724 (or 74171717 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 22251512100 in words is "twenty-two billion, two hundred fifty-one million, five hundred twelve thousand, one hundred".