22145712 has 40 divisors (see below), whose sum is σ = 57548400. Its totient is φ = 7338240.

The previous prime is 22145663. The next prime is 22145723. The reversal of 22145712 is 21754122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7414 + ... + 9962.

It is an arithmetic number, because the mean of its divisors is an integer number (1438710).

Almost surely, 2^22145712 is an apocalyptic number.

It is an amenable number.

22145712 is an abundant number, since it is smaller than the sum of its proper divisors (35402688).

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

22145712 is a wasteful number, since it uses less digits than its factorization.

22145712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2735 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 22145712 is about 4705.9230762944. The cubic root of 22145712 is about 280.8211946567.

Adding to 22145712 its reverse (21754122), we get a palindrome (43899834).

The spelling of 22145712 in words is "twenty-two million, one hundred forty-five thousand, seven hundred twelve".