51378130 has 16 divisors (see below), whose sum is σ = 93748824. Its totient is φ = 20269440.

The previous prime is 51378101. The next prime is 51378143. The reversal of 51378130 is 3187315.

It can be written as a sum of positive squares in 4 ways, for example, as 38353249 + 13024881 = 6193^2 + 3609^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34461 + ... + 35920.

Almost surely, 2^51378130 is an apocalyptic number.

51378130 is a deficient number, since it is larger than the sum of its proper divisors (42370694).

51378130 is a wasteful number, since it uses less digits than its factorization.

51378130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70461.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 51378130 is about 7167.8539326635. The cubic root of 51378130 is about 371.7572364913.

The spelling of 51378130 in words is "fifty-one million, three hundred seventy-eight thousand, one hundred thirty".