22722645 has 16 divisors (see below), whose sum is σ = 39661632. Its totient is φ = 11016960.

The previous prime is 22722641. The next prime is 22722647. The reversal of 22722645 is 54622722.

It is not a de Polignac number, because 22722645 - 2² = 22722641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22722641) 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 15 ways as a sum of consecutive naturals, for example, 68692 + ... + 69021.

It is an arithmetic number, because the mean of its divisors is an integer number (2478852).

Almost surely, 2^22722645 is an apocalyptic number.

It is an amenable number.

22722645 is a deficient number, since it is larger than the sum of its proper divisors (16938987).

22722645 is a wasteful number, since it uses less digits than its factorization.

22722645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137732.

The product of its digits is 13440, while the sum is 30.

The square root of 22722645 is about 4766.8275613871. The cubic root of 22722645 is about 283.2389404903.

It can be divided in two parts, 227 and 22645, that multiplied together give a palindrome (5140415).

The spelling of 22722645 in words is "twenty-two million, seven hundred twenty-two thousand, six hundred forty-five".