31315213050 has 48 divisors (see below), whose sum is σ = 84721889952. Its totient is φ = 7591566400.

The previous prime is 31315213031. The next prime is 31315213073. The reversal of 31315213050 is 5031251313.

It is a self number, because there is not a number n which added to its sum of digits gives 31315213050.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9487809 + ... + 9491108.

It is an arithmetic number, because the mean of its divisors is an integer number (1765039374).

Almost surely, 2^31315213050 is an apocalyptic number.

31315213050 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31315213050 is an abundant number, since it is smaller than the sum of its proper divisors (53406676902).

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

31315213050 is a wasteful number, since it uses less digits than its factorization.

31315213050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18978943 (or 18978938 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

Adding to 31315213050 its reverse (5031251313), we get a palindrome (36346464363).

The spelling of 31315213050 in words is "thirty-one billion, three hundred fifteen million, two hundred thirteen thousand, fifty".