22000031 has 2 divisors, whose sum is σ = 22000032. Its totient is φ = 22000030.

The previous prime is 22000021. The next prime is 22000037. The reversal of 22000031 is 13000022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22000031 - 2¹⁰ = 21999007 is a prime.

It is a super-2 number, since 2×22000031² = 968002728001922, 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 = 21999982 and 22000018.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000015 + 11000016.

It is an arithmetic number, because the mean of its divisors is an integer number (11000016).

Almost surely, 2^22000031 is an apocalyptic number.

22000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000031 is an equidigital number, since it uses as much as digits as its factorization.

22000031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 22000031 is about 4690.4190644334. The cubic root of 22000031 is about 280.2040646764.

Adding to 22000031 its reverse (13000022), we get a palindrome (35000053).

Subtracting from 22000031 its reverse (13000022), we obtain a palindrome (9000009).

The spelling of 22000031 in words is "twenty-two million, thirty-one", and thus it is an aban number and an uban number.