22492491 has 16 divisors (see below), whose sum is σ = 34372608. Its totient is φ = 12816000.

The previous prime is 22492489. The next prime is 22492499. The reversal of 22492491 is 19429422.

It is not a de Polignac number, because 22492491 - 2¹ = 22492489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22492499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7086 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (2148288).

Almost surely, 2^22492491 is an apocalyptic number.

22492491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22492491 is a deficient number, since it is larger than the sum of its proper divisors (11880117).

22492491 is a wasteful number, since it uses less digits than its factorization.

22492491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082.

The product of its digits is 10368, while the sum is 33.

The square root of 22492491 is about 4742.6249061042. The cubic root of 22492491 is about 282.2793996609.

The spelling of 22492491 in words is "twenty-two million, four hundred ninety-two thousand, four hundred ninety-one".