30915609231 has 12 divisors (see below), whose sum is σ = 44635554888. Its totient is φ = 19024989984.

The previous prime is 30915609203. The next prime is 30915609247. The reversal of 30915609231 is 13290651903.

It is not a de Polignac number, because 30915609231 - 2¹⁹ = 30915084943 is a prime.

It is a super-2 number, since 2×30915609231² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 30915609231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30915609031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30488260 + ... + 30489273.

It is an arithmetic number, because the mean of its divisors is an integer number (3719629574).

Almost surely, 2^30915609231 is an apocalyptic number.

30915609231 is a deficient number, since it is larger than the sum of its proper divisors (13719945657).

30915609231 is a wasteful number, since it uses less digits than its factorization.

30915609231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60977562 (or 60977549 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

It can be divided in two parts, 30915 and 609231, that added together give a triangular number (640146 = T₁₁₃₁).

The spelling of 30915609231 in words is "thirty billion, nine hundred fifteen million, six hundred nine thousand, two hundred thirty-one".