22664501 has 4 divisors (see below), whose sum is σ = 22889004. Its totient is φ = 22440000.

The previous prime is 22664491. The next prime is 22664527. The reversal of 22664501 is 10546622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12773476 + 9891025 = 3574^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 22664501 - 2²² = 18470197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22664531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112100 + ... + 112301.

It is an arithmetic number, because the mean of its divisors is an integer number (5722251).

Almost surely, 2^22664501 is an apocalyptic number.

It is an amenable number.

22664501 is a deficient number, since it is larger than the sum of its proper divisors (224503).

22664501 is a wasteful number, since it uses less digits than its factorization.

22664501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224502.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22664501 is about 4760.7248397697. The cubic root of 22664501 is about 282.9971448142.

The spelling of 22664501 in words is "twenty-two million, six hundred sixty-four thousand, five hundred one".