22277144 has 8 divisors (see below), whose sum is σ = 41769660. Its totient is φ = 11138568.

The previous prime is 22277137. The next prime is 22277147. The reversal of 22277144 is 44177222.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×22277144² = 992542289593472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22277147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1392314 + ... + 1392329.

Almost surely, 2^22277144 is an apocalyptic number.

It is an amenable number.

22277144 is a deficient number, since it is larger than the sum of its proper divisors (19492516).

22277144 is a wasteful number, since it uses less digits than its factorization.

22277144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784649 (or 2784645 counting only the distinct ones).

The product of its digits is 6272, while the sum is 29.

The square root of 22277144 is about 4719.8669472772. The cubic root of 22277144 is about 281.3756453260.

The spelling of 22277144 in words is "twenty-two million, two hundred seventy-seven thousand, one hundred forty-four".