51528377 has 6 divisors (see below), whose sum is σ = 54590814. Its totient is φ = 48469440.

The previous prime is 51528359. The next prime is 51528391. The reversal of 51528377 is 77382515.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2262016 + 49266361 = 1504^2 + 7019^2 .

It is not a de Polignac number, because 51528377 - 2²⁰ = 50479801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51528377.

It is not an unprimeable number, because it can be changed into a prime (51528307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28727 + ... + 30467.

It is an arithmetic number, because the mean of its divisors is an integer number (9098469).

Almost surely, 2^51528377 is an apocalyptic number.

It is an amenable number.

51528377 is a deficient number, since it is larger than the sum of its proper divisors (3062437).

51528377 is an frugal number, since it uses more digits than its factorization.

51528377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499 (or 1758 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 51528377 is about 7178.3268942003. The cubic root of 51528377 is about 372.1192650503.

The spelling of 51528377 in words is "fifty-one million, five hundred twenty-eight thousand, three hundred seventy-seven".