22136531 has 2 divisors, whose sum is σ = 22136532. Its totient is φ = 22136530.

The previous prime is 22136509. The next prime is 22136537. The reversal of 22136531 is 13563122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22136531 - 2¹⁰ = 22135507 is a prime.

It is a super-2 number, since 2×22136531² = 980052009427922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22136497 and 22136506.

It is not a weakly prime, because it can be changed into another prime (22136537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11068265 + 11068266.

It is an arithmetic number, because the mean of its divisors is an integer number (11068266).

Almost surely, 2^22136531 is an apocalyptic number.

22136531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22136531 is an equidigital number, since it uses as much as digits as its factorization.

22136531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 22136531 is about 4704.9475023639. The cubic root of 22136531 is about 280.7823823913.

Adding to 22136531 its reverse (13563122), we get a palindrome (35699653).

The spelling of 22136531 in words is "twenty-two million, one hundred thirty-six thousand, five hundred thirty-one".