22154644 has 6 divisors (see below), whose sum is σ = 38770634. Its totient is φ = 11077320.

The previous prime is 22154641. The next prime is 22154647. The reversal of 22154644 is 44645122.

It is an interprime number because it is at equal distance from previous prime (22154641) and next prime (22154647).

It can be written as a sum of positive squares in only one way, i.e., 21808900 + 345744 = 4670^2 + 588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2769327 + ... + 2769334.

Almost surely, 2^22154644 is an apocalyptic number.

It is an amenable number.

22154644 is a deficient number, since it is larger than the sum of its proper divisors (16615990).

22154644 is a wasteful number, since it uses less digits than its factorization.

22154644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538665 (or 5538663 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 22154644 is about 4706.8719974097. The cubic root of 22154644 is about 280.8589439926.

Adding to 22154644 its reverse (44645122), we get a palindrome (66799766).

It can be divided in two parts, 2215 and 4644, that added together give a cube (6859 = 19³).

The spelling of 22154644 in words is "twenty-two million, one hundred fifty-four thousand, six hundred forty-four".