31820522085 has 32 divisors (see below), whose sum is σ = 61712530560. Its totient is φ = 15428131200.

The previous prime is 31820522081. The next prime is 31820522131. The reversal of 31820522085 is 58022502813.

31820522085 is a `hidden beast` number, since 31 + 8 + 20 + 522 + 0 + 85 = 666.

It is not a de Polignac number, because 31820522085 - 2² = 31820522081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31820522081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10712496 + ... + 10715465.

It is an arithmetic number, because the mean of its divisors is an integer number (1928516580).

Almost surely, 2^31820522085 is an apocalyptic number.

It is an amenable number.

31820522085 is a deficient number, since it is larger than the sum of its proper divisors (29892008475).

31820522085 is a wasteful number, since it uses less digits than its factorization.

31820522085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21427986 (or 21427980 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 31820522085 in words is "thirty-one billion, eight hundred twenty million, five hundred twenty-two thousand, eighty-five".