22998921 has 8 divisors (see below), whose sum is σ = 33453024. Its totient is φ = 13938720.

The previous prime is 22998907. The next prime is 22998923. The reversal of 22998921 is 12989922.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22998921 - 2¹⁹ = 22474633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22998923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348436 + ... + 348501.

It is an arithmetic number, because the mean of its divisors is an integer number (4181628).

Almost surely, 2^22998921 is an apocalyptic number.

It is an amenable number.

22998921 is a deficient number, since it is larger than the sum of its proper divisors (10454103).

22998921 is a wasteful number, since it uses less digits than its factorization.

22998921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696951.

The product of its digits is 46656, while the sum is 42.

The square root of 22998921 is about 4795.7190284670. The cubic root of 22998921 is about 284.3822507671.

The spelling of 22998921 in words is "twenty-two million, nine hundred ninety-eight thousand, nine hundred twenty-one".