22180031 has 2 divisors, whose sum is σ = 22180032. Its totient is φ = 22180030.

The previous prime is 22180013. The next prime is 22180063. The reversal of 22180031 is 13008122.

Together with previous prime (22180013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22180031 - 2²² = 17985727 is a prime.

It is a super-2 number, since 2×22180031² = 983907550321922, 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 = 22179991 and 22180009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22180231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11090015 + 11090016.

It is an arithmetic number, because the mean of its divisors is an integer number (11090016).

Almost surely, 2^22180031 is an apocalyptic number.

22180031 is a deficient number, since it is larger than the sum of its proper divisors (1).

22180031 is an equidigital number, since it uses as much as digits as its factorization.

22180031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 22180031 is about 4709.5680269001. The cubic root of 22180031 is about 280.9661817687.

Adding to 22180031 its reverse (13008122), we get a palindrome (35188153).

The spelling of 22180031 in words is "twenty-two million, one hundred eighty thousand, thirty-one".