22135481 has 2 divisors, whose sum is σ = 22135482. Its totient is φ = 22135480.

The previous prime is 22135459. The next prime is 22135493. The reversal of 22135481 is 18453122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 6295081 = 3980^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 22135481 - 2⁶ = 22135417 is a prime.

It is a super-2 number, since 2×22135481² = 979959038202722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1397231 and since 22135481 and 1397231 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22135481.

It is not a weakly prime, because it can be changed into another prime (22135441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11067740 + 11067741.

It is an arithmetic number, because the mean of its divisors is an integer number (11067741).

Almost surely, 2^22135481 is an apocalyptic number.

It is an amenable number.

22135481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22135481 is an equidigital number, since it uses as much as digits as its factorization.

22135481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 22135481 is about 4704.8359163737. The cubic root of 22135481 is about 280.7779428796. Note that the first 3 decimals are identical.

The spelling of 22135481 in words is "twenty-two million, one hundred thirty-five thousand, four hundred eighty-one".