31320312130 has 32 divisors (see below), whose sum is σ = 56726841600. Its totient is φ = 12450419712.

The previous prime is 31320312071. The next prime is 31320312131. The reversal of 31320312130 is 3121302313.

It is a junction number, because it is equal to n+sod(n) for n = 31320312098 and 31320312107.

It is not an unprimeable number, because it can be changed into a prime (31320312131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1997461 + ... + 2013079.

It is an arithmetic number, because the mean of its divisors is an integer number (1772713800).

Almost surely, 2^31320312130 is an apocalyptic number.

31320312130 is a deficient number, since it is larger than the sum of its proper divisors (25406529470).

31320312130 is a wasteful number, since it uses less digits than its factorization.

31320312130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16858.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31320312130 its reverse (3121302313), we get a palindrome (34441614443).

The spelling of 31320312130 in words is "thirty-one billion, three hundred twenty million, three hundred twelve thousand, one hundred thirty".