51730047 has 6 divisors (see below), whose sum is σ = 74721192. Its totient is φ = 34486692.

The previous prime is 51730043. The next prime is 51730051. The reversal of 51730047 is 74003715.

It is an interprime number because it is at equal distance from previous prime (51730043) and next prime (51730051).

It is not a de Polignac number, because 51730047 - 2² = 51730043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51730047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2873883 + ... + 2873900.

It is an arithmetic number, because the mean of its divisors is an integer number (12453532).

Almost surely, 2^51730047 is an apocalyptic number.

51730047 is a deficient number, since it is larger than the sum of its proper divisors (22991145).

51730047 is a wasteful number, since it uses less digits than its factorization.

51730047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747789 (or 5747786 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 51730047 is about 7192.3603218971. The cubic root of 51730047 is about 372.6040956467.

The spelling of 51730047 in words is "fifty-one million, seven hundred thirty thousand, forty-seven".