22406513 has 2 divisors, whose sum is σ = 22406514. Its totient is φ = 22406512.

The previous prime is 22406509. The next prime is 22406537. The reversal of 22406513 is 31560422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16418704 + 5987809 = 4052^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 22406513 - 2² = 22406509 is a prime.

It is not a weakly prime, because it can be changed into another prime (22406543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11203256 + 11203257.

It is an arithmetic number, because the mean of its divisors is an integer number (11203257).

Almost surely, 2^22406513 is an apocalyptic number.

It is an amenable number.

22406513 is a deficient number, since it is larger than the sum of its proper divisors (1).

22406513 is an equidigital number, since it uses as much as digits as its factorization.

22406513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 22406513 is about 4733.5518376796. The cubic root of 22406513 is about 281.9192675021.

Adding to 22406513 its reverse (31560422), we get a palindrome (53966935).

The spelling of 22406513 in words is "twenty-two million, four hundred six thousand, five hundred thirteen".