31275520206 has 128 divisors (see below), whose sum is σ = 77005071360. Its totient is φ = 8278502400.

The previous prime is 31275520193. The next prime is 31275520223. The reversal of 31275520206 is 60202557213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3041085 + ... + 3051351.

It is an arithmetic number, because the mean of its divisors is an integer number (601602120).

Almost surely, 2^31275520206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31275520206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38502535680).

31275520206 is an abundant number, since it is smaller than the sum of its proper divisors (45729551154).

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

31275520206 is a wasteful number, since it uses less digits than its factorization.

31275520206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410.

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 31275520206 in words is "thirty-one billion, two hundred seventy-five million, five hundred twenty thousand, two hundred six".