22031293 has 2 divisors, whose sum is σ = 22031294. Its totient is φ = 22031292.

The previous prime is 22031287. The next prime is 22031299. The reversal of 22031293 is 39213022.

It is a balanced prime because it is at equal distance from previous prime (22031287) and next prime (22031299).

It can be written as a sum of positive squares in only one way, i.e., 15665764 + 6365529 = 3958^2 + 2523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22031293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031299) 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, 11015646 + 11015647.

It is an arithmetic number, because the mean of its divisors is an integer number (11015647).

Almost surely, 2^22031293 is an apocalyptic number.

It is an amenable number.

22031293 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031293 is an equidigital number, since it uses as much as digits as its factorization.

22031293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 22031293 is about 4693.7504194407. The cubic root of 22031293 is about 280.3367249978.

It can be divided in two parts, 220 and 31293, that added together give a palindrome (31513).

The spelling of 22031293 in words is "twenty-two million, thirty-one thousand, two hundred ninety-three".