31142315020 has 12 divisors (see below), whose sum is σ = 65398861584. Its totient is φ = 12456926000.

The previous prime is 31142315003. The next prime is 31142315021. The reversal of 31142315020 is 2051324113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31142314982 and 31142315000.

It is not an unprimeable number, because it can be changed into a prime (31142315021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778557856 + ... + 778557895.

It is an arithmetic number, because the mean of its divisors is an integer number (5449905132).

Almost surely, 2^31142315020 is an apocalyptic number.

It is an amenable number.

31142315020 is an abundant number, since it is smaller than the sum of its proper divisors (34256546564).

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

31142315020 is a wasteful number, since it uses less digits than its factorization.

31142315020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557115760 (or 1557115758 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 31142315020 its reverse (2051324113), we get a palindrome (33193639133).

The spelling of 31142315020 in words is "thirty-one billion, one hundred forty-two million, three hundred fifteen thousand, twenty".