31020030131320 has 64 divisors (see below), whose sum is σ = 70945480448640. Its totient is φ = 12203529984000.

The previous prime is 31020030131309. The next prime is 31020030131341. The reversal of 31020030131320 is 2313103002013.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27514720 + ... + 28619920.

It is an arithmetic number, because the mean of its divisors is an integer number (1108523132010).

Almost surely, 2^{31020030131320} is an apocalyptic number.

It is an amenable number.

31020030131320 is an abundant number, since it is smaller than the sum of its proper divisors (39925450317320).

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

31020030131320 is a wasteful number, since it uses less digits than its factorization.

31020030131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116776 (or 1116772 counting only the distinct ones).

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

Adding to 31020030131320 its reverse (2313103002013), we get a palindrome (33333133133333).

The spelling of 31020030131320 in words is "thirty-one trillion, twenty billion, thirty million, one hundred thirty-one thousand, three hundred twenty".