22365491 has 4 divisors (see below), whose sum is σ = 22383984. Its totient is φ = 22347000.

The previous prime is 22365479. The next prime is 22365503. The reversal of 22365491 is 19456322.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (22365479) and next prime (22365503).

It is a cyclic number.

It is not a de Polignac number, because 22365491 - 2¹⁰ = 22364467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22365401) 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, 7295 + ... + 9896.

It is an arithmetic number, because the mean of its divisors is an integer number (5595996).

Almost surely, 2^22365491 is an apocalyptic number.

22365491 is a deficient number, since it is larger than the sum of its proper divisors (18493).

22365491 is a wasteful number, since it uses less digits than its factorization.

22365491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18492.

The product of its digits is 12960, while the sum is 32.

The square root of 22365491 is about 4729.2167427598. The cubic root of 22365491 is about 281.7471158146.

The spelling of 22365491 in words is "twenty-two million, three hundred sixty-five thousand, four hundred ninety-one".