31230302231 has 4 divisors (see below), whose sum is σ = 31249713600. Its totient is φ = 31210890864.

The previous prime is 31230302219. The next prime is 31230302269. The reversal of 31230302231 is 13220303213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13220303213 = 13 ⋅1016946401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31230302231 is a prime.

It is a super-2 number, since 2×31230302231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230302281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9703271 + ... + 9706488.

It is an arithmetic number, because the mean of its divisors is an integer number (7812428400).

Almost surely, 2^31230302231 is an apocalyptic number.

31230302231 is a deficient number, since it is larger than the sum of its proper divisors (19411369).

31230302231 is a wasteful number, since it uses less digits than its factorization.

31230302231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19411368.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31230302231 its reverse (13220303213), we get a palindrome (44450605444).

The spelling of 31230302231 in words is "thirty-one billion, two hundred thirty million, three hundred two thousand, two hundred thirty-one".