223120031 has 2 divisors, whose sum is σ = 223120032. Its totient is φ = 223120030.

The previous prime is 223120013. The next prime is 223120043. The reversal of 223120031 is 130021322.

It is a happy number.

Together with previous prime (223120013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223120031 is a prime.

It is a super-3 number, since 3×223120031³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 223119988 and 223120015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223120061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111560015 + 111560016.

It is an arithmetic number, because the mean of its divisors is an integer number (111560016).

Almost surely, 2^223120031 is an apocalyptic number.

223120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

223120031 is an equidigital number, since it uses as much as digits as its factorization.

223120031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 223120031 is about 14937.2029175478. The cubic root of 223120031 is about 606.5214816137.

Adding to 223120031 its reverse (130021322), we get a palindrome (353141353).

The spelling of 223120031 in words is "two hundred twenty-three million, one hundred twenty thousand, thirty-one".