22725812 has 6 divisors (see below), whose sum is σ = 39770178. Its totient is φ = 11362904.

The previous prime is 22725811. The next prime is 22725823. The reversal of 22725812 is 21852722.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 106276 = 4756^2 + 326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22725811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840723 + ... + 2840730.

It is an arithmetic number, because the mean of its divisors is an integer number (6628363).

Almost surely, 2^22725812 is an apocalyptic number.

It is an amenable number.

22725812 is a deficient number, since it is larger than the sum of its proper divisors (17044366).

22725812 is a wasteful number, since it uses less digits than its factorization.

22725812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681457 (or 5681455 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 22725812 is about 4767.1597413974. The cubic root of 22725812 is about 283.2520988184.

The spelling of 22725812 in words is "twenty-two million, seven hundred twenty-five thousand, eight hundred twelve".