22725643 has 2 divisors, whose sum is σ = 22725644. Its totient is φ = 22725642.

The previous prime is 22725607. The next prime is 22725671. The reversal of 22725643 is 34652722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22725643 is a prime.

It is not a weakly prime, because it can be changed into another prime (22723643) 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 as a sum of consecutive naturals, namely, 11362821 + 11362822.

It is an arithmetic number, because the mean of its divisors is an integer number (11362822).

Almost surely, 2^22725643 is an apocalyptic number.

22725643 is a deficient number, since it is larger than the sum of its proper divisors (1).

22725643 is an equidigital number, since it uses as much as digits as its factorization.

22725643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 22725643 is about 4767.1420159253. The cubic root of 22725643 is about 283.2513966840.

The spelling of 22725643 in words is "twenty-two million, seven hundred twenty-five thousand, six hundred forty-three".