22722887 has 4 divisors (see below), whose sum is σ = 24788616. Its totient is φ = 20657160.

The previous prime is 22722883. The next prime is 22722893. The reversal of 22722887 is 78822722.

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 22722887 - 2² = 22722883 is a prime.

It is a super-2 number, since 2×22722887² = 1032659187229538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22722887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22722883) 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, 1032848 + ... + 1032869.

It is an arithmetic number, because the mean of its divisors is an integer number (6197154).

Almost surely, 2^22722887 is an apocalyptic number.

22722887 is a deficient number, since it is larger than the sum of its proper divisors (2065729).

22722887 is a wasteful number, since it uses less digits than its factorization.

22722887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065728.

The product of its digits is 50176, while the sum is 38.

The square root of 22722887 is about 4766.8529450781. The cubic root of 22722887 is about 283.2399460009.

The spelling of 22722887 in words is "twenty-two million, seven hundred twenty-two thousand, eight hundred eighty-seven".