51728234 has 4 divisors (see below), whose sum is σ = 77592354. Its totient is φ = 25864116.

The previous prime is 51728233. The next prime is 51728249. The reversal of 51728234 is 43282715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42211009 + 9517225 = 6497^2 + 3085^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51728234.

It is not an unprimeable number, because it can be changed into a prime (51728233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932057 + ... + 12932060.

Almost surely, 2^51728234 is an apocalyptic number.

51728234 is a deficient number, since it is larger than the sum of its proper divisors (25864120).

51728234 is a wasteful number, since it uses less digits than its factorization.

51728234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25864119.

The product of its digits is 13440, while the sum is 32.

The square root of 51728234 is about 7192.2342842819. The cubic root of 51728234 is about 372.5997426697.

The spelling of 51728234 in words is "fifty-one million, seven hundred twenty-eight thousand, two hundred thirty-four".