31305121274 has 24 divisors (see below), whose sum is σ = 57837436020. Its totient is φ = 12627275136.

The previous prime is 31305121261. The next prime is 31305121277. The reversal of 31305121274 is 47212150313.

It can be written as a sum of positive squares in 2 ways, for example, as 30907398025 + 397723249 = 175805^2 + 19943^2 .

It is not an unprimeable number, because it can be changed into a prime (31305121277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9393629 + ... + 9396960.

Almost surely, 2^31305121274 is an apocalyptic number.

31305121274 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31305121274 is a deficient number, since it is larger than the sum of its proper divisors (26532314746).

31305121274 is a wasteful number, since it uses less digits than its factorization.

31305121274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18790622 (or 18790615 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 31305121274 its reverse (47212150313), we get a palindrome (78517271587).

The spelling of 31305121274 in words is "thirty-one billion, three hundred five million, one hundred twenty-one thousand, two hundred seventy-four".