22490831 has 4 divisors (see below), whose sum is σ = 24535464. Its totient is φ = 20446200.

The previous prime is 22490827. The next prime is 22490891. The reversal of 22490831 is 13809422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22490831 - 2² = 22490827 is a prime.

It is a super-2 number, since 2×22490831² = 1011674958141122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22490794 and 22490803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22490891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022300 + ... + 1022321.

It is an arithmetic number, because the mean of its divisors is an integer number (6133866).

Almost surely, 2^22490831 is an apocalyptic number.

22490831 is a deficient number, since it is larger than the sum of its proper divisors (2044633).

22490831 is a wasteful number, since it uses less digits than its factorization.

22490831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044632.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 22490831 is about 4742.4498943057. The cubic root of 22490831 is about 282.2724551902.

The spelling of 22490831 in words is "twenty-two million, four hundred ninety thousand, eight hundred thirty-one".