51400208 has 40 divisors (see below), whose sum is σ = 101645280. Its totient is φ = 25176320.

The previous prime is 51400177. The next prime is 51400229. The reversal of 51400208 is 80200415.

It is a self number, because there is not a number n which added to its sum of digits gives 51400208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287063 + ... + 287241.

It is an arithmetic number, because the mean of its divisors is an integer number (2541132).

Almost surely, 2^51400208 is an apocalyptic number.

It is an amenable number.

51400208 is a deficient number, since it is larger than the sum of its proper divisors (50245072).

51400208 is a wasteful number, since it uses less digits than its factorization.

51400208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 51400208 is about 7169.3938376965. The cubic root of 51400208 is about 371.8104788656.

The spelling of 51400208 in words is "fifty-one million, four hundred thousand, two hundred eight".