22720523 has 16 divisors (see below), whose sum is σ = 27552000. Its totient is φ = 18302112.

The previous prime is 22720507. The next prime is 22720531. The reversal of 22720523 is 32502722.

It is a cyclic number.

It is not a de Polignac number, because 22720523 - 2⁴ = 22720507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22720583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17873 + ... + 19101.

It is an arithmetic number, because the mean of its divisors is an integer number (1722000).

Almost surely, 2^22720523 is an apocalyptic number.

22720523 is a deficient number, since it is larger than the sum of its proper divisors (4831477).

22720523 is a wasteful number, since it uses less digits than its factorization.

22720523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 22720523 is about 4766.6049762908. The cubic root of 22720523 is about 283.2301232694.

The spelling of 22720523 in words is "twenty-two million, seven hundred twenty thousand, five hundred twenty-three".