31011014320 has 160 divisors (see below), whose sum is σ = 85971997440. Its totient is φ = 10253675520.

The previous prime is 31011014261. The next prime is 31011014329. The reversal of 31011014320 is 2341011013.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31011014294 and 31011014303.

It is not an unprimeable number, because it can be changed into a prime (31011014329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746251 + ... + 786709.

It is an arithmetic number, because the mean of its divisors is an integer number (537324984).

Almost surely, 2^31011014320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31011014320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42985998720).

31011014320 is an abundant number, since it is smaller than the sum of its proper divisors (54960983120).

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

31011014320 is a wasteful number, since it uses less digits than its factorization.

31011014320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40563 (or 40557 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31011014320 its reverse (2341011013), we get a palindrome (33352025333).

The spelling of 31011014320 in words is "thirty-one billion, eleven million, fourteen thousand, three hundred twenty".