51371630 has 32 divisors (see below), whose sum is σ = 98336160. Its totient is φ = 19267200.

The previous prime is 51371599. The next prime is 51371641. The reversal of 51371630 is 3617315.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51371630.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 17852 + ... + 20528.

It is an arithmetic number, because the mean of its divisors is an integer number (3073005).

Almost surely, 2^51371630 is an apocalyptic number.

51371630 is a deficient number, since it is larger than the sum of its proper divisors (46964530).

51371630 is a wasteful number, since it uses less digits than its factorization.

51371630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 51371630 is about 7167.4005050646. The cubic root of 51371630 is about 371.7415584590.

Adding to 51371630 its reverse (3617315), we get a palindrome (54988945).

The spelling of 51371630 in words is "fifty-one million, three hundred seventy-one thousand, six hundred thirty".