22147656 has 32 divisors (see below), whose sum is σ = 56311200. Its totient is φ = 7256960.

The previous prime is 22147639. The next prime is 22147663. The reversal of 22147656 is 65674122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6405 + ... + 9236.

It is an arithmetic number, because the mean of its divisors is an integer number (1759725).

Almost surely, 2^22147656 is an apocalyptic number.

It is an amenable number.

22147656 is an abundant number, since it is smaller than the sum of its proper divisors (34163544).

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

22147656 is a wasteful number, since it uses less digits than its factorization.

22147656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15709 (or 15705 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 22147656 is about 4706.1296199744. The cubic root of 22147656 is about 280.8294114533.

It can be divided in two parts, 2214 and 7656, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 22147656 in words is "twenty-two million, one hundred forty-seven thousand, six hundred fifty-six".