51651730 has 32 divisors (see below), whose sum is σ = 101352384. Its totient is φ = 18837696.

The previous prime is 51651713. The next prime is 51651739. The reversal of 51651730 is 3715615.

It is not an unprimeable number, because it can be changed into a prime (51651739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8397 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (3167262).

Almost surely, 2^51651730 is an apocalyptic number.

51651730 is a deficient number, since it is larger than the sum of its proper divisors (49700654).

51651730 is a wasteful number, since it uses less digits than its factorization.

51651730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4890.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 51651730 is about 7186.9138021824. The cubic root of 51651730 is about 372.4159653085.

The spelling of 51651730 in words is "fifty-one million, six hundred fifty-one thousand, seven hundred thirty".