31201230223 has 2 divisors, whose sum is σ = 31201230224. Its totient is φ = 31201230222.

The previous prime is 31201230217. The next prime is 31201230227. The reversal of 31201230223 is 32203210213.

It is a strong prime.

It is an emirp because it is prime and its reverse (32203210213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201230223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31201230223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201230227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600615111 + 15600615112.

It is an arithmetic number, because the mean of its divisors is an integer number (15600615112).

Almost surely, 2^31201230223 is an apocalyptic number.

31201230223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201230223 is an equidigital number, since it uses as much as digits as its factorization.

31201230223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31201230223 its reverse (32203210213), we get a palindrome (63404440436).

The spelling of 31201230223 in words is "thirty-one billion, two hundred one million, two hundred thirty thousand, two hundred twenty-three".