22861491 has 4 divisors (see below), whose sum is σ = 30481992. Its totient is φ = 15240992.

The previous prime is 22861463. The next prime is 22861493. The reversal of 22861491 is 19416822.

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 22861491 - 2⁹ = 22860979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22861493) 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, 3810246 + ... + 3810251.

It is an arithmetic number, because the mean of its divisors is an integer number (7620498).

Almost surely, 2^22861491 is an apocalyptic number.

22861491 is a deficient number, since it is larger than the sum of its proper divisors (7620501).

22861491 is an equidigital number, since it uses as much as digits as its factorization.

22861491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7620500.

The product of its digits is 6912, while the sum is 33.

The square root of 22861491 is about 4781.3691553780. The cubic root of 22861491 is about 283.8146769190.

The spelling of 22861491 in words is "twenty-two million, eight hundred sixty-one thousand, four hundred ninety-one".