22000000031 has 2 divisors, whose sum is σ = 22000000032. Its totient is φ = 22000000030.

The previous prime is 22000000021. The next prime is 22000000037. The reversal of 22000000031 is 13000000022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000000031 is a prime.

It is a super-2 number, since 2×22000000031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21999999955 and 22000000018.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000000037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000000015 + 11000000016.

It is an arithmetic number, because the mean of its divisors is an integer number (11000000016).

Almost surely, 2^22000000031 is an apocalyptic number.

22000000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000000031 is an equidigital number, since it uses as much as digits as its factorization.

22000000031 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.

Adding to 22000000031 its reverse (13000000022), we get a palindrome (35000000053).

Subtracting from 22000000031 its reverse (13000000022), we obtain a palindrome (9000000009).

The spelling of 22000000031 in words is "twenty-two billion, thirty-one", and thus it is an aban number and an uban number.