31402320850 has 48 divisors (see below), whose sum is σ = 60555889800. Its totient is φ = 12100999680.

The previous prime is 31402320847. The next prime is 31402320871. The reversal of 31402320850 is 5802320413.

It is a Cunningham number, because it is equal to 177207²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 697118409 + 30705202441 = 26403^2 + 175229^2 .

It is a super-2 number, since 2×31402320850² (a number of 22 digits) contains 22 as substring.

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, 638956 + ... + 686344.

Almost surely, 2^31402320850 is an apocalyptic number.

31402320850 is a deficient number, since it is larger than the sum of its proper divisors (29153568950).

31402320850 is a wasteful number, since it uses less digits than its factorization.

31402320850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47887 (or 47882 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 31402320850 in words is "thirty-one billion, four hundred two million, three hundred twenty thousand, eight hundred fifty".