22570813 has 2 divisors, whose sum is σ = 22570814. Its totient is φ = 22570812.

The previous prime is 22570811. The next prime is 22570819. The reversal of 22570813 is 31807522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22297284 + 273529 = 4722^2 + 523^2 .

It is a cyclic number.

It is not a de Polignac number, because 22570813 - 2¹ = 22570811 is a prime.

Together with 22570811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22570811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11285406 + 11285407.

It is an arithmetic number, because the mean of its divisors is an integer number (11285407).

Almost surely, 2^22570813 is an apocalyptic number.

It is an amenable number.

22570813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22570813 is an equidigital number, since it uses as much as digits as its factorization.

22570813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 22570813 is about 4750.8749720446. The cubic root of 22570813 is about 282.6066655445.

The spelling of 22570813 in words is "twenty-two million, five hundred seventy thousand, eight hundred thirteen".