22012831 has 2 divisors, whose sum is σ = 22012832. Its totient is φ = 22012830.

The previous prime is 22012829. The next prime is 22012853. The reversal of 22012831 is 13821022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22012831 - 2¹ = 22012829 is a prime.

It is a super-2 number, since 2×22012831² = 969129457269122, which contains 22 as substring.

Together with 22012829, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22012799 and 22012808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006415 + 11006416.

It is an arithmetic number, because the mean of its divisors is an integer number (11006416).

Almost surely, 2^22012831 is an apocalyptic number.

22012831 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012831 is an equidigital number, since it uses as much as digits as its factorization.

22012831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22012831 is about 4691.7833496444. The cubic root of 22012831 is about 280.2583966706.

Adding to 22012831 its reverse (13821022), we get a palindrome (35833853).

The spelling of 22012831 in words is "twenty-two million, twelve thousand, eight hundred thirty-one".