22660521 has 32 divisors (see below), whose sum is σ = 34957440. Its totient is φ = 12939264.

The previous prime is 22660501. The next prime is 22660523. The reversal of 22660521 is 12506622.

It is not a de Polignac number, because 22660521 - 2⁵ = 22660489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22660491 and 22660500.

It is not an unprimeable number, because it can be changed into a prime (22660523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38985 + ... + 39561.

It is an arithmetic number, because the mean of its divisors is an integer number (1092420).

Almost surely, 2^22660521 is an apocalyptic number.

It is an amenable number.

22660521 is a deficient number, since it is larger than the sum of its proper divisors (12296919).

22660521 is a wasteful number, since it uses less digits than its factorization.

22660521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22660521 is about 4760.3068178427. The cubic root of 22660521 is about 282.9805786054.

The spelling of 22660521 in words is "twenty-two million, six hundred sixty thousand, five hundred twenty-one".