22151898 has 24 divisors (see below), whose sum is σ = 50083488. Its totient is φ = 7062792.

The previous prime is 22151897. The next prime is 22151903. The reversal of 22151898 is 89815122.

It is not an unprimeable number, because it can be changed into a prime (22151893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26340 + ... + 27167.

It is an arithmetic number, because the mean of its divisors is an integer number (2086812).

Almost surely, 2^22151898 is an apocalyptic number.

22151898 is an abundant number, since it is smaller than the sum of its proper divisors (27931590).

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

22151898 is a wasteful number, since it uses less digits than its factorization.

22151898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53538 (or 53535 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 22151898 is about 4706.5802872149. The cubic root of 22151898 is about 280.8473396457.

The spelling of 22151898 in words is "twenty-two million, one hundred fifty-one thousand, eight hundred ninety-eight".