31230223 has 2 divisors, whose sum is σ = 31230224. Its totient is φ = 31230222.

The previous prime is 31230211. The next prime is 31230229. The reversal of 31230223 is 32203213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31230223 - 2⁵ = 31230191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31230197 and 31230206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230229) 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, 15615111 + 15615112.

It is an arithmetic number, because the mean of its divisors is an integer number (15615112).

Almost surely, 2^31230223 is an apocalyptic number.

31230223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230223 is an equidigital number, since it uses as much as digits as its factorization.

31230223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 31230223 is about 5588.4007551356. The cubic root of 31230223 is about 314.9138018953.

Adding to 31230223 its reverse (32203213), we get a palindrome (63433436).

The spelling of 31230223 in words is "thirty-one million, two hundred thirty thousand, two hundred twenty-three".