51628545 has 12 divisors (see below), whose sum is σ = 89489556. Its totient is φ = 27535200.

The previous prime is 51628543. The next prime is 51628559. The reversal of 51628545 is 54582615.

51628545 is a `hidden beast` number, since 51 + 62 + 8 + 545 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39350529 + 12278016 = 6273^2 + 3504^2 .

It is not a de Polignac number, because 51628545 - 2¹ = 51628543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51628543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 573606 + ... + 573695.

It is an arithmetic number, because the mean of its divisors is an integer number (7457463).

Almost surely, 2^51628545 is an apocalyptic number.

It is an amenable number.

51628545 is a deficient number, since it is larger than the sum of its proper divisors (37861011).

51628545 is a wasteful number, since it uses less digits than its factorization.

51628545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147312 (or 1147309 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 51628545 is about 7185.3006200158. The cubic root of 51628545 is about 372.3602346395.

The spelling of 51628545 in words is "fifty-one million, six hundred twenty-eight thousand, five hundred forty-five".