31325443320 has 64 divisors (see below), whose sum is σ = 94397829120. Its totient is φ = 8315985024.

The previous prime is 31325443309. The next prime is 31325443337. The reversal of 31325443320 is 2334452313.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558544 + ... + 612063.

It is an arithmetic number, because the mean of its divisors is an integer number (1474966080).

Almost surely, 2^31325443320 is an apocalyptic number.

31325443320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31325443320 is an abundant number, since it is smaller than the sum of its proper divisors (63072385800).

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

31325443320 is a wasteful number, since it uses less digits than its factorization.

31325443320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170844 (or 1170840 counting only the distinct ones).

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

Adding to 31325443320 its reverse (2334452313), we get a palindrome (33659895633).

The spelling of 31325443320 in words is "thirty-one billion, three hundred twenty-five million, four hundred forty-three thousand, three hundred twenty".