51730133 has 36 divisors (see below), whose sum is σ = 69086052. Its totient is φ = 38384640.

The previous prime is 51730117. The next prime is 51730139. The reversal of 51730133 is 33103715.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1844164 + 49885969 = 1358^2 + 7063^2 .

It is not a de Polignac number, because 51730133 - 2⁴ = 51730117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51730099 and 51730108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730139) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 183953 + ... + 184233.

It is an arithmetic number, because the mean of its divisors is an integer number (1919057).

Almost surely, 2^51730133 is an apocalyptic number.

It is an amenable number.

51730133 is a deficient number, since it is larger than the sum of its proper divisors (17355919).

51730133 is a wasteful number, since it uses less digits than its factorization.

51730133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 23.

The square root of 51730133 is about 7192.3663004605. The cubic root of 51730133 is about 372.6043021285.

Adding to 51730133 its reverse (33103715), we get a palindrome (84833848).

The spelling of 51730133 in words is "fifty-one million, seven hundred thirty thousand, one hundred thirty-three".