51528727 has 4 divisors (see below), whose sum is σ = 53190976. Its totient is φ = 49866480.

The previous prime is 51528721. The next prime is 51528731. The reversal of 51528727 is 72782515.

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

It is a cyclic number.

It is not a de Polignac number, because 51528727 - 2¹¹ = 51526679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51528721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831078 + ... + 831139.

It is an arithmetic number, because the mean of its divisors is an integer number (13297744).

Almost surely, 2^51528727 is an apocalyptic number.

51528727 is a deficient number, since it is larger than the sum of its proper divisors (1662249).

51528727 is a wasteful number, since it uses less digits than its factorization.

51528727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662248.

The product of its digits is 39200, while the sum is 37.

The square root of 51528727 is about 7178.3512730989. The cubic root of 51528727 is about 372.1201075727.

The spelling of 51528727 in words is "fifty-one million, five hundred twenty-eight thousand, seven hundred twenty-seven".