22811972 has 12 divisors (see below), whose sum is σ = 40294800. Its totient is φ = 11299176.

The previous prime is 22811963. The next prime is 22811981. The reversal of 22811972 is 27911822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22811963) and next prime (22811981).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26222 + ... + 27077.

It is an arithmetic number, because the mean of its divisors is an integer number (3357900).

Almost surely, 2^22811972 is an apocalyptic number.

It is an amenable number.

22811972 is a deficient number, since it is larger than the sum of its proper divisors (17482828).

22811972 is a wasteful number, since it uses less digits than its factorization.

22811972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53410 (or 53408 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 22811972 is about 4776.1880197496. The cubic root of 22811972 is about 283.6096104082.

It can be divided in two parts, 228 and 11972, that multiplied together give a triangular number (2729616 = T₂₃₃₆).

The spelling of 22811972 in words is "twenty-two million, eight hundred eleven thousand, nine hundred seventy-two".