22185013 has 2 divisors, whose sum is σ = 22185014. Its totient is φ = 22185012.

The previous prime is 22184999. The next prime is 22185019. The reversal of 22185013 is 31058122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17489124 + 4695889 = 4182^2 + 2167^2 .

It is a cyclic number.

It is not a de Polignac number, because 22185013 - 2²¹ = 20087861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22185019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11092506 + 11092507.

It is an arithmetic number, because the mean of its divisors is an integer number (11092507).

Almost surely, 2^22185013 is an apocalyptic number.

It is an amenable number.

22185013 is a deficient number, since it is larger than the sum of its proper divisors (1).

22185013 is an equidigital number, since it uses as much as digits as its factorization.

22185013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 22185013 is about 4710.0969204465. The cubic root of 22185013 is about 280.9872167367.

The spelling of 22185013 in words is "twenty-two million, one hundred eighty-five thousand, thirteen".