22131631 has 2 divisors, whose sum is σ = 22131632. Its totient is φ = 22131630.

The previous prime is 22131619. The next prime is 22131643. The reversal of 22131631 is 13613122.

It is a balanced prime because it is at equal distance from previous prime (22131619) and next prime (22131643).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22131631 is a prime.

It is a super-2 number, since 2×22131631² = 979618181440322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22131599 and 22131608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065815 + 11065816.

It is an arithmetic number, because the mean of its divisors is an integer number (11065816).

Almost surely, 2^22131631 is an apocalyptic number.

22131631 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131631 is an equidigital number, since it uses as much as digits as its factorization.

22131631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 22131631 is about 4704.4267450987. The cubic root of 22131631 is about 280.7616634689.

Adding to 22131631 its reverse (13613122), we get a palindrome (35744753).

It can be divided in two parts, 2213 and 1631, that added together give a square (3844 = 62²).

The spelling of 22131631 in words is "twenty-two million, one hundred thirty-one thousand, six hundred thirty-one".