51720802 has 32 divisors (see below), whose sum is σ = 91494144. Its totient is φ = 21470400.

The previous prime is 51720751. The next prime is 51720811. The reversal of 51720802 is 20802715.

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, 60208 + ... + 61060.

It is an arithmetic number, because the mean of its divisors is an integer number (2859192).

Almost surely, 2^51720802 is an apocalyptic number.

51720802 is a deficient number, since it is larger than the sum of its proper divisors (39773342).

51720802 is a wasteful number, since it uses less digits than its factorization.

51720802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 51720802 is about 7191.7175973477. The cubic root of 51720802 is about 372.5818975221.

The spelling of 51720802 in words is "fifty-one million, seven hundred twenty thousand, eight hundred two".