31628381211 has 48 divisors (see below), whose sum is σ = 52579238400. Its totient is φ = 17946593280.

The previous prime is 31628381173. The next prime is 31628381231. The reversal of 31628381211 is 11218382613.

31628381211 is a `hidden beast` number, since 3 + 1 + 62 + 8 + 381 + 211 = 666.

It is not a de Polignac number, because 31628381211 - 2²² = 31624186907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31628381231) 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 in 47 ways as a sum of consecutive naturals, for example, 7056091 + ... + 7060571.

It is an arithmetic number, because the mean of its divisors is an integer number (1095400800).

Almost surely, 2^31628381211 is an apocalyptic number.

31628381211 is a deficient number, since it is larger than the sum of its proper divisors (20950857189).

31628381211 is a wasteful number, since it uses less digits than its factorization.

31628381211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256 (or 5253 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The spelling of 31628381211 in words is "thirty-one billion, six hundred twenty-eight million, three hundred eighty-one thousand, two hundred eleven".