22719321 has 6 divisors (see below), whose sum is σ = 32816810. Its totient is φ = 15146208.

The previous prime is 22719287. The next prime is 22719329. The reversal of 22719321 is 12391722.

It can be written as a sum of positive squares in only one way, i.e., 12702096 + 10017225 = 3564^2 + 3165^2 .

It is not a de Polignac number, because 22719321 - 2⁹ = 22718809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22719329) 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, 1262176 + ... + 1262193.

Almost surely, 2^22719321 is an apocalyptic number.

It is an amenable number.

22719321 is a deficient number, since it is larger than the sum of its proper divisors (10097489).

22719321 is a wasteful number, since it uses less digits than its factorization.

22719321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524375 (or 2524372 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 22719321 is about 4766.4788890752. The cubic root of 22719321 is about 283.2251285397.

The spelling of 22719321 in words is "twenty-two million, seven hundred nineteen thousand, three hundred twenty-one".