30312013231 has 2 divisors, whose sum is σ = 30312013232. Its totient is φ = 30312013230.

The previous prime is 30312013213. The next prime is 30312013241. The reversal of 30312013231 is 13231021303.

Together with previous prime (30312013213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13231021303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30312013231 - 2¹⁵ = 30311980463 is a prime.

It is a super-2 number, since 2×30312013231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30312013199 and 30312013208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30312013241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156006615 + 15156006616.

It is an arithmetic number, because the mean of its divisors is an integer number (15156006616).

Almost surely, 2^30312013231 is an apocalyptic number.

30312013231 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312013231 is an equidigital number, since it uses as much as digits as its factorization.

30312013231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 30312013231 its reverse (13231021303), we get a palindrome (43543034534).

The spelling of 30312013231 in words is "thirty billion, three hundred twelve million, thirteen thousand, two hundred thirty-one".