31628550851 has 2 divisors, whose sum is σ = 31628550852. Its totient is φ = 31628550850.

The previous prime is 31628550817. The next prime is 31628550853. The reversal of 31628550851 is 15805582613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31628550851 is a prime.

It is a Sophie Germain prime.

Together with 31628550853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31628550853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15814275425 + 15814275426.

It is an arithmetic number, because the mean of its divisors is an integer number (15814275426).

Almost surely, 2^31628550851 is an apocalyptic number.

31628550851 is a deficient number, since it is larger than the sum of its proper divisors (1).

31628550851 is an equidigital number, since it uses as much as digits as its factorization.

31628550851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 31628550851 in words is "thirty-one billion, six hundred twenty-eight million, five hundred fifty thousand, eight hundred fifty-one".