31000230312 has 16 divisors (see below), whose sum is σ = 77500575840. Its totient is φ = 10333410096.

The previous prime is 31000230307. The next prime is 31000230377. The reversal of 31000230312 is 21303200013.

It is a super-2 number, since 2×31000230312² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31000230291 and 31000230300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645838108 + ... + 645838155.

It is an arithmetic number, because the mean of its divisors is an integer number (4843785990).

Almost surely, 2^31000230312 is an apocalyptic number.

It is an amenable number.

31000230312 is an abundant number, since it is smaller than the sum of its proper divisors (46500345528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31000230312 is a wasteful number, since it uses less digits than its factorization.

31000230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291676272 (or 1291676268 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31000230312 its reverse (21303200013), we get a palindrome (52303430325).

The spelling of 31000230312 in words is "thirty-one billion, two hundred thirty thousand, three hundred twelve".