22712013 has 6 divisors (see below), whose sum is σ = 32806254. Its totient is φ = 15141336.

The previous prime is 22711981. The next prime is 22712021. The reversal of 22712013 is 31021722.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 2082249 = 4542^2 + 1443^2 .

It is not a de Polignac number, because 22712013 - 2⁵ = 22711981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22712023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1261770 + ... + 1261787.

It is an arithmetic number, because the mean of its divisors is an integer number (5467709).

Almost surely, 2^22712013 is an apocalyptic number.

It is an amenable number.

22712013 is a deficient number, since it is larger than the sum of its proper divisors (10094241).

22712013 is a wasteful number, since it uses less digits than its factorization.

22712013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523563 (or 2523560 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 22712013 is about 4765.7122237919. The cubic root of 22712013 is about 283.1947574559.

Adding to 22712013 its reverse (31021722), we get a palindrome (53733735).

The spelling of 22712013 in words is "twenty-two million, seven hundred twelve thousand, thirteen".