22947491 has 12 divisors (see below), whose sum is σ = 27419952. Its totient is φ = 18811056.

The previous prime is 22947481. The next prime is 22947517. The reversal of 22947491 is 19474922.

It is not a de Polignac number, because 22947491 - 2⁶ = 22947427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22947451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 605 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (2284996).

Almost surely, 2^22947491 is an apocalyptic number.

22947491 is a deficient number, since it is larger than the sum of its proper divisors (4472461).

22947491 is an equidigital number, since it uses as much as digits as its factorization.

22947491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6250 (or 6227 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 22947491 is about 4790.3539535195. The cubic root of 22947491 is about 284.1701148045.

It can be divided in two parts, 22 and 947491, that multiplied together give a palindrome (20844802).

The spelling of 22947491 in words is "twenty-two million, nine hundred forty-seven thousand, four hundred ninety-one".