51031208 has 32 divisors (see below), whose sum is σ = 99221760. Its totient is φ = 24579840.

The previous prime is 51031199. The next prime is 51031217. The reversal of 51031208 is 80213015.

It is an interprime number because it is at equal distance from previous prime (51031199) and next prime (51031217).

It is a self number, because there is not a number n which added to its sum of digits gives 51031208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85760 + ... + 86352.

It is an arithmetic number, because the mean of its divisors is an integer number (3100680).

Almost surely, 2^51031208 is an apocalyptic number.

It is an amenable number.

51031208 is a deficient number, since it is larger than the sum of its proper divisors (48190552).

51031208 is a wasteful number, since it uses less digits than its factorization.

51031208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51031208 is about 7143.6130914265. The cubic root of 51031208 is about 370.9186037749.

The spelling of 51031208 in words is "fifty-one million, thirty-one thousand, two hundred eight".