22390031 has 2 divisors, whose sum is σ = 22390032. Its totient is φ = 22390030.

The previous prime is 22390013. The next prime is 22390051. The reversal of 22390031 is 13009322.

Together with previous prime (22390013) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (22390051) can be obtained adding 22390031 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22390031 - 2¹⁴ = 22373647 is a prime.

It is a super-2 number, since 2×22390031² = 1002626976361922, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 22389985 and 22390012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22390051) 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, 11195015 + 11195016.

It is an arithmetic number, because the mean of its divisors is an integer number (11195016).

Almost surely, 2^22390031 is an apocalyptic number.

22390031 is a deficient number, since it is larger than the sum of its proper divisors (1).

22390031 is an equidigital number, since it uses as much as digits as its factorization.

22390031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 22390031 is about 4731.8105414313. The cubic root of 22390031 is about 281.8501249101.

Adding to 22390031 its reverse (13009322), we get a palindrome (35399353).

The spelling of 22390031 in words is "twenty-two million, three hundred ninety thousand, thirty-one".