22772991 has 8 divisors (see below), whose sum is σ = 30659200. Its totient is φ = 15034392.

The previous prime is 22772951. The next prime is 22772993. The reversal of 22772991 is 19927722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22772991 - 2⁹ = 22772479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22772993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36541 + ... + 37158.

It is an arithmetic number, because the mean of its divisors is an integer number (3832400).

Almost surely, 2^22772991 is an apocalyptic number.

22772991 is a deficient number, since it is larger than the sum of its proper divisors (7886209).

22772991 is a wasteful number, since it uses less digits than its factorization.

22772991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73805.

The product of its digits is 31752, while the sum is 39.

The square root of 22772991 is about 4772.1055101496. The cubic root of 22772991 is about 283.4479746768.

The spelling of 22772991 in words is "twenty-two million, seven hundred seventy-two thousand, nine hundred ninety-one".