51163730 has 32 divisors (see below), whose sum is σ = 98164224. Its totient is φ = 19155136.

The previous prime is 51163703. The next prime is 51163741. The reversal of 51163730 is 3736115.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51163730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8444 + ... + 13176.

It is an arithmetic number, because the mean of its divisors is an integer number (3067632).

Almost surely, 2^51163730 is an apocalyptic number.

51163730 is a deficient number, since it is larger than the sum of its proper divisors (47000494).

51163730 is a wasteful number, since it uses less digits than its factorization.

51163730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810.

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

The square root of 51163730 is about 7152.8826356931. The cubic root of 51163730 is about 371.2394034621.

Adding to 51163730 its reverse (3736115), we get a palindrome (54899845).

The spelling of 51163730 in words is "fifty-one million, one hundred sixty-three thousand, seven hundred thirty".