31025105300000 has 144 divisors (see below), whose sum is σ = 87252526105920. Its totient is φ = 10637178720000.

The previous prime is 31025105299933. The next prime is 31025105300003. The reversal of 31025105300000 is 350152013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31025105300003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21460790 + ... + 22860789.

It is an arithmetic number, because the mean of its divisors is an integer number (605920320180).

Almost surely, 2^{31025105300000} is an apocalyptic number.

It is an amenable number.

31025105300000 is an abundant number, since it is smaller than the sum of its proper divisors (56227420805920).

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

31025105300000 is an frugal number, since it uses more digits than its factorization.

31025105300000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44321621 (or 44321593 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

Adding to 31025105300000 its reverse (350152013), we get a palindrome (31025455452013).

The spelling of 31025105300000 in words is "thirty-one trillion, twenty-five billion, one hundred five million, three hundred thousand".