22507117 has 2 divisors, whose sum is σ = 22507118. Its totient is φ = 22507116.

The previous prime is 22507061. The next prime is 22507123. The reversal of 22507117 is 71170522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21353641 + 1153476 = 4621^2 + 1074^2 .

It is a cyclic number.

It is not a de Polignac number, because 22507117 - 2²³ = 14118509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22507091 and 22507100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22507157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11253558 + 11253559.

It is an arithmetic number, because the mean of its divisors is an integer number (11253559).

Almost surely, 2^22507117 is an apocalyptic number.

It is an amenable number.

22507117 is a deficient number, since it is larger than the sum of its proper divisors (1).

22507117 is an equidigital number, since it uses as much as digits as its factorization.

22507117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 22507117 is about 4744.1666286082. The cubic root of 22507117 is about 282.3405715416.

Adding to 22507117 its reverse (71170522), we get a palindrome (93677639).

The spelling of 22507117 in words is "twenty-two million, five hundred seven thousand, one hundred seventeen".