22521673 has 2 divisors, whose sum is σ = 22521674. Its totient is φ = 22521672.

The previous prime is 22521647. The next prime is 22521683. The reversal of 22521673 is 37612522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22165264 + 356409 = 4708^2 + 597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22521673 is a prime.

It is not a weakly prime, because it can be changed into another prime (22521643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260836 + 11260837.

It is an arithmetic number, because the mean of its divisors is an integer number (11260837).

Almost surely, 2^22521673 is an apocalyptic number.

It is an amenable number.

22521673 is a deficient number, since it is larger than the sum of its proper divisors (1).

22521673 is an equidigital number, since it uses as much as digits as its factorization.

22521673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 22521673 is about 4745.7004751670. The cubic root of 22521673 is about 282.4014243482.

The spelling of 22521673 in words is "twenty-two million, five hundred twenty-one thousand, six hundred seventy-three".