31303177216 has 132 divisors (see below), whose sum is σ = 65497973632. Its totient is φ = 14951817216.

The previous prime is 31303177211. The next prime is 31303177219. The reversal of 31303177216 is 61277130313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303177211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140372881 + ... + 140373103.

Almost surely, 2^31303177216 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 31303177216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32748986816).

31303177216 is an abundant number, since it is smaller than the sum of its proper divisors (34194796416).

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

31303177216 is a wasteful number, since it uses less digits than its factorization.

31303177216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 34.

The spelling of 31303177216 in words is "thirty-one billion, three hundred three million, one hundred seventy-seven thousand, two hundred sixteen".