22228631 has 2 divisors, whose sum is σ = 22228632. Its totient is φ = 22228630.

The previous prime is 22228621. The next prime is 22228667. The reversal of 22228631 is 13682222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22228631 - 2⁶ = 22228567 is a prime.

It is a super-2 number, since 2×22228631² = 988224072268322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22228631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22228621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11114315 + 11114316.

It is an arithmetic number, because the mean of its divisors is an integer number (11114316).

Almost surely, 2^22228631 is an apocalyptic number.

22228631 is a deficient number, since it is larger than the sum of its proper divisors (1).

22228631 is an equidigital number, since it uses as much as digits as its factorization.

22228631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 22228631 is about 4714.7249124419. The cubic root of 22228631 is about 281.1712460321.

The spelling of 22228631 in words is "twenty-two million, two hundred twenty-eight thousand, six hundred thirty-one".