51500378 has 12 divisors (see below), whose sum is σ = 82062942. Its totient is φ = 24235200.

The previous prime is 51500377. The next prime is 51500389. The reversal of 51500378 is 87300515.

51500378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 43072969 + 8427409 = 6563^2 + 2903^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51500378.

It is not an unprimeable number, because it can be changed into a prime (51500377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43973 + ... + 45128.

Almost surely, 2^51500378 is an apocalyptic number.

51500378 is a deficient number, since it is larger than the sum of its proper divisors (30562564).

51500378 is a wasteful number, since it uses less digits than its factorization.

51500378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89137 (or 89120 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51500378 is about 7176.3763836633. The cubic root of 51500378 is about 372.0518532952.

The spelling of 51500378 in words is "fifty-one million, five hundred thousand, three hundred seventy-eight".