22810813 has 2 divisors, whose sum is σ = 22810814. Its totient is φ = 22810812.

The previous prime is 22810783. The next prime is 22810817. The reversal of 22810813 is 31801822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16793604 + 6017209 = 4098^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 22810813 - 2¹³ = 22802621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22810817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11405406 + 11405407.

It is an arithmetic number, because the mean of its divisors is an integer number (11405407).

Almost surely, 2^22810813 is an apocalyptic number.

It is an amenable number.

22810813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22810813 is an equidigital number, since it uses as much as digits as its factorization.

22810813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 22810813 is about 4776.0666871391. The cubic root of 22810813 is about 283.6048072416.

The spelling of 22810813 in words is "twenty-two million, eight hundred ten thousand, eight hundred thirteen".