22921497 has 12 divisors (see below), whose sum is σ = 33167524. Its totient is φ = 15253920.

The previous prime is 22921471. The next prime is 22921511. The reversal of 22921497 is 79412922.

It can be written as a sum of positive squares in 2 ways, for example, as 21123216 + 1798281 = 4596^2 + 1341^2 .

It is not a de Polignac number, because 22921497 - 2¹⁵ = 22888729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22921697) 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, 4023 + ... + 7875.

Almost surely, 2^22921497 is an apocalyptic number.

It is an amenable number.

22921497 is a deficient number, since it is larger than the sum of its proper divisors (10246027).

22921497 is a wasteful number, since it uses less digits than its factorization.

22921497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520 (or 4517 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 22921497 is about 4787.6400240620. The cubic root of 22921497 is about 284.0627754175.

The spelling of 22921497 in words is "twenty-two million, nine hundred twenty-one thousand, four hundred ninety-seven".