22651772 has 36 divisors (see below), whose sum is σ = 46805976. Its totient is φ = 9456480.

The previous prime is 22651771. The next prime is 22651789. The reversal of 22651772 is 27715622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22651771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113729 + ... + 113927.

It is an arithmetic number, because the mean of its divisors is an integer number (1300166).

Almost surely, 2^22651772 is an apocalyptic number.

22651772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22651772 is an abundant number, since it is smaller than the sum of its proper divisors (24154204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22651772 is a wasteful number, since it uses less digits than its factorization.

22651772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 225 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 22651772 is about 4759.3877757544. The cubic root of 22651772 is about 282.9441552625.

It can be divided in two parts, 2265177 and 2, that multiplied together give a palindrome (4530354).

The spelling of 22651772 in words is "twenty-two million, six hundred fifty-one thousand, seven hundred seventy-two".