22235531 has 2 divisors, whose sum is σ = 22235532. Its totient is φ = 22235530.

The previous prime is 22235527. The next prime is 22235533. The reversal of 22235531 is 13553222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22235531 - 2² = 22235527 is a prime.

It is a super-2 number, since 2×22235531² = 988837677703922, which contains 22 as substring.

Together with 22235533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22235497 and 22235506.

It is not a weakly prime, because it can be changed into another prime (22235533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11117765 + 11117766.

It is an arithmetic number, because the mean of its divisors is an integer number (11117766).

Almost surely, 2^22235531 is an apocalyptic number.

22235531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22235531 is an equidigital number, since it uses as much as digits as its factorization.

22235531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 23.

The square root of 22235531 is about 4715.4566056746. The cubic root of 22235531 is about 281.2003358562.

Adding to 22235531 its reverse (13553222), we get a palindrome (35788753).

It can be divided in two parts, 222 and 35531, that added together give a palindrome (35753).

The spelling of 22235531 in words is "twenty-two million, two hundred thirty-five thousand, five hundred thirty-one".