22145072 has 10 divisors (see below), whose sum is σ = 42906108. Its totient is φ = 11072528.

The previous prime is 22145059. The next prime is 22145087. The reversal of 22145072 is 27054122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692018 + ... + 692049.

Almost surely, 2^22145072 is an apocalyptic number.

It is an amenable number.

22145072 is a deficient number, since it is larger than the sum of its proper divisors (20761036).

22145072 is a wasteful number, since it uses less digits than its factorization.

22145072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384075 (or 1384069 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 22145072 is about 4705.8550763915. The cubic root of 22145072 is about 280.8184894333.

Adding to 22145072 its reverse (27054122), we get a palindrome (49199194).

The spelling of 22145072 in words is "twenty-two million, one hundred forty-five thousand, seventy-two".