51000730 has 16 divisors (see below), whose sum is σ = 100147104. Its totient is φ = 18545680.

The previous prime is 51000727. The next prime is 51000737. The reversal of 51000730 is 3700015.

It is not an unprimeable number, because it can be changed into a prime (51000737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231712 + ... + 231931.

It is an arithmetic number, because the mean of its divisors is an integer number (6259194).

Almost surely, 2^51000730 is an apocalyptic number.

51000730 is a deficient number, since it is larger than the sum of its proper divisors (49146374).

51000730 is a wasteful number, since it uses less digits than its factorization.

51000730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463661.

The product of its (nonzero) digits is 105, while the sum is 16.

The square root of 51000730 is about 7141.4795385830. The cubic root of 51000730 is about 370.8447462997.

Adding to 51000730 its reverse (3700015), we get a palindrome (54700745).

The spelling of 51000730 in words is "fifty-one million, seven hundred thirty", and thus it is an aban number.