30031220231 has 2 divisors, whose sum is σ = 30031220232. Its totient is φ = 30031220230.

The previous prime is 30031220179. The next prime is 30031220269. The reversal of 30031220231 is 13202213003.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30031220231 is a prime.

It is a super-2 number, since 2×30031220231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30031220731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15015610115 + 15015610116.

It is an arithmetic number, because the mean of its divisors is an integer number (15015610116).

Almost surely, 2^30031220231 is an apocalyptic number.

30031220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

30031220231 is an equidigital number, since it uses as much as digits as its factorization.

30031220231 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 17.

Adding to 30031220231 its reverse (13202213003), we get a palindrome (43233433234).

The spelling of 30031220231 in words is "thirty billion, thirty-one million, two hundred twenty thousand, two hundred thirty-one".