22672561 has 2 divisors, whose sum is σ = 22672562. Its totient is φ = 22672560.

The previous prime is 22672547. The next prime is 22672591. The reversal of 22672561 is 16527622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 6471936 = 4025^2 + 2544^2 .

It is a cyclic number.

It is not a de Polignac number, because 22672561 - 2⁹ = 22672049 is a prime.

It is not a weakly prime, because it can be changed into another prime (22672591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11336280 + 11336281.

It is an arithmetic number, because the mean of its divisors is an integer number (11336281).

Almost surely, 2^22672561 is an apocalyptic number.

It is an amenable number.

22672561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22672561 is an equidigital number, since it uses as much as digits as its factorization.

22672561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 22672561 is about 4761.5712742749. The cubic root of 22672561 is about 283.0306875287.

The spelling of 22672561 in words is "twenty-two million, six hundred seventy-two thousand, five hundred sixty-one".