51803330 has 16 divisors (see below), whose sum is σ = 95766840. Its totient is φ = 20161152.

The previous prime is 51803299. The next prime is 51803393. The reversal of 51803330 is 3330815.

It can be written as a sum of positive squares in 4 ways, for example, as 49182169 + 2621161 = 7013^2 + 1619^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51803296 and 51803305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69635 + ... + 70374.

Almost surely, 2^51803330 is an apocalyptic number.

51803330 is a deficient number, since it is larger than the sum of its proper divisors (43963510).

51803330 is a wasteful number, since it uses less digits than its factorization.

51803330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140053.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 51803330 is about 7197.4530217293. The cubic root of 51803330 is about 372.7799615995.

The spelling of 51803330 in words is "fifty-one million, eight hundred three thousand, three hundred thirty".