22961491 has 4 divisors (see below), whose sum is σ = 26241712. Its totient is φ = 19681272.

The previous prime is 22961489. The next prime is 22961501. The reversal of 22961491 is 19416922.

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 22961491 - 2¹ = 22961489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22961461) 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, 1640100 + ... + 1640113.

It is an arithmetic number, because the mean of its divisors is an integer number (6560428).

Almost surely, 2^22961491 is an apocalyptic number.

22961491 is a deficient number, since it is larger than the sum of its proper divisors (3280221).

22961491 is an equidigital number, since it uses as much as digits as its factorization.

22961491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280220.

The product of its digits is 7776, while the sum is 34.

The square root of 22961491 is about 4791.8150006026. The cubic root of 22961491 is about 284.2278926944.

The spelling of 22961491 in words is "twenty-two million, nine hundred sixty-one thousand, four hundred ninety-one".