22502813 has 2 divisors, whose sum is σ = 22502814. Its totient is φ = 22502812.

The previous prime is 22502797. The next prime is 22502827. The reversal of 22502813 is 31820522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19035769 + 3467044 = 4363^2 + 1862^2 .

It is a cyclic number.

It is not a de Polignac number, because 22502813 - 2⁴ = 22502797 is a prime.

It is a super-3 number, since 3×22502813³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22502863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11251406 + 11251407.

It is an arithmetic number, because the mean of its divisors is an integer number (11251407).

Almost surely, 2^22502813 is an apocalyptic number.

It is an amenable number.

22502813 is a deficient number, since it is larger than the sum of its proper divisors (1).

22502813 is an equidigital number, since it uses as much as digits as its factorization.

22502813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 22502813 is about 4743.7129972206. The cubic root of 22502813 is about 282.3225732156.

The spelling of 22502813 in words is "twenty-two million, five hundred two thousand, eight hundred thirteen".