51730297 has 4 divisors (see below), whose sum is σ = 51796816. Its totient is φ = 51663780.

The previous prime is 51730277. The next prime is 51730307. The reversal of 51730297 is 79203715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51730297 - 2¹¹ = 51728249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51730207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32079 + ... + 33652.

It is an arithmetic number, because the mean of its divisors is an integer number (12949204).

Almost surely, 2^51730297 is an apocalyptic number.

It is an amenable number.

51730297 is a deficient number, since it is larger than the sum of its proper divisors (66519).

51730297 is an equidigital number, since it uses as much as digits as its factorization.

51730297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66518.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 51730297 is about 7192.3777014281. The cubic root of 51730297 is about 372.6046958838.

The spelling of 51730297 in words is "fifty-one million, seven hundred thirty thousand, two hundred ninety-seven".