22154900 has 18 divisors (see below), whose sum is σ = 48076350. Its totient is φ = 8861920.

The previous prime is 22154887. The next prime is 22154929. The reversal of 22154900 is 945122.

It can be written as a sum of positive squares in 3 ways, for example, as 8464 + 22146436 = 92^2 + 4706^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110675 + ... + 110874.

Almost surely, 2^22154900 is an apocalyptic number.

22154900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22154900 is an abundant number, since it is smaller than the sum of its proper divisors (25921450).

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

22154900 is a wasteful number, since it uses less digits than its factorization.

22154900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221563 (or 221556 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 22154900 is about 4706.8991916122. The cubic root of 22154900 is about 280.8600257765.

The spelling of 22154900 in words is "twenty-two million, one hundred fifty-four thousand, nine hundred".