22712289 has 8 divisors (see below), whose sum is σ = 32064480. Its totient is φ = 14250816.

The previous prime is 22712281. The next prime is 22712297. The reversal of 22712289 is 98221722.

It is an interprime number because it is at equal distance from previous prime (22712281) and next prime (22712297).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22712289 - 2³ = 22712281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22712281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222619 + ... + 222720.

It is an arithmetic number, because the mean of its divisors is an integer number (4008060).

Almost surely, 2^22712289 is an apocalyptic number.

It is an amenable number.

22712289 is a deficient number, since it is larger than the sum of its proper divisors (9352191).

22712289 is a wasteful number, since it uses less digits than its factorization.

22712289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445359.

The product of its digits is 8064, while the sum is 33.

The square root of 22712289 is about 4765.7411805510. The cubic root of 22712289 is about 283.1959045938.

It can be divided in two parts, 2271 and 2289, that added together give a triangular number (4560 = T₉₅).

The spelling of 22712289 in words is "twenty-two million, seven hundred twelve thousand, two hundred eighty-nine".