51375208 has 8 divisors (see below), whose sum is σ = 96328530. Its totient is φ = 25687600.

The previous prime is 51375199. The next prime is 51375217. The reversal of 51375208 is 80257315.

It is an interprime number because it is at equal distance from previous prime (51375199) and next prime (51375217).

It can be written as a sum of positive squares in only one way, i.e., 32695524 + 18679684 = 5718^2 + 4322^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51375208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210943 + ... + 3210958.

Almost surely, 2^51375208 is an apocalyptic number.

It is an amenable number.

51375208 is a deficient number, since it is larger than the sum of its proper divisors (44953322).

51375208 is a wasteful number, since it uses less digits than its factorization.

51375208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421907 (or 6421903 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 51375208 is about 7167.6501030673. The cubic root of 51375208 is about 371.7501887764.

The spelling of 51375208 in words is "fifty-one million, three hundred seventy-five thousand, two hundred eight".