51730308 has 72 divisors (see below), whose sum is σ = 150969728. Its totient is φ = 14629248.

The previous prime is 51730307. The next prime is 51730363. The reversal of 51730308 is 80303715.

It is not an unprimeable number, because it can be changed into a prime (51730307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24960 + ... + 26952.

Almost surely, 2^51730308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51730308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75484864).

51730308 is an abundant number, since it is smaller than the sum of its proper divisors (99239420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51730308 is a wasteful number, since it uses less digits than its factorization.

51730308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51730308 is about 7192.3784661265. The cubic root of 51730308 is about 372.6047222942.

The spelling of 51730308 in words is "fifty-one million, seven hundred thirty thousand, three hundred eight".