22151212398 has 160 divisors (see below), whose sum is σ = 60189744384. Its totient is φ = 5944036608.

The previous prime is 22151212387. The next prime is 22151212411. The reversal of 22151212398 is 89321215122.

22151212398 is a `hidden beast` number, since 2 + 2 + 1 + 51 + 212 + 398 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12394861 + ... + 12396647.

Almost surely, 2^22151212398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22151212398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30094872192).

22151212398 is an abundant number, since it is smaller than the sum of its proper divisors (38038531986).

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

22151212398 is a wasteful number, since it uses less digits than its factorization.

22151212398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468 (or 2459 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The spelling of 22151212398 in words is "twenty-two billion, one hundred fifty-one million, two hundred twelve thousand, three hundred ninety-eight".