31343245320 has 64 divisors (see below), whose sum is σ = 96030385920. Its totient is φ = 8180363264.

The previous prime is 31343245313. The next prime is 31343245333. The reversal of 31343245320 is 2354234313.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2773017 + ... + 2784296.

It is an arithmetic number, because the mean of its divisors is an integer number (1500474780).

Almost surely, 2^31343245320 is an apocalyptic number.

31343245320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31343245320 is an abundant number, since it is smaller than the sum of its proper divisors (64687140600).

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

31343245320 is a wasteful number, since it uses less digits than its factorization.

31343245320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557374 (or 5557370 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 31343245320 its reverse (2354234313), we get a palindrome (33697479633).

The spelling of 31343245320 in words is "thirty-one billion, three hundred forty-three million, two hundred forty-five thousand, three hundred twenty".