51700000 has 144 divisors (see below), whose sum is σ = 141740928. Its totient is φ = 18400000.

The previous prime is 51699997. The next prime is 51700003. The reversal of 51700000 is 715.

It is an interprime number because it is at equal distance from previous prime (51699997) and next prime (51700003).

It is not an unprimeable number, because it can be changed into a prime (51700003) 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, 1099977 + ... + 1100023.

It is an arithmetic number, because the mean of its divisors is an integer number (984312).

Almost surely, 2^51700000 is an apocalyptic number.

51700000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70870464).

51700000 is an abundant number, since it is smaller than the sum of its proper divisors (90040928).

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

51700000 is an equidigital number, since it uses as much as digits as its factorization.

51700000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 35, while the sum is 13.

The square root of 51700000 is about 7190.2712048990. The cubic root of 51700000 is about 372.5319402668.

Adding to 51700000 its reverse (715), we get a palindrome (51700715).

The spelling of 51700000 in words is "fifty-one million, seven hundred thousand".