51730164 has 60 divisors (see below), whose sum is σ = 137308864. Its totient is φ = 16978896.

The previous prime is 51730163. The next prime is 51730183. The reversal of 51730164 is 46103715.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730163) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20517 + ... + 22899.

Almost surely, 2^51730164 is an apocalyptic number.

51730164 is a gapful number since it is divisible by the number (54) 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 51730164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68654432).

51730164 is an abundant number, since it is smaller than the sum of its proper divisors (85578700).

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

51730164 is a wasteful number, since it uses less digits than its factorization.

51730164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466 (or 2455 counting only the distinct ones).

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

The square root of 51730164 is about 7192.3684555228. The cubic root of 51730164 is about 372.6043765579.

Adding to 51730164 its reverse (46103715), we get a palindrome (97833879).

The spelling of 51730164 in words is "fifty-one million, seven hundred thirty thousand, one hundred sixty-four".