51789285 has 12 divisors (see below), whose sum is σ = 89768172. Its totient is φ = 27620928.

The previous prime is 51789281. The next prime is 51789289. The reversal of 51789285 is 58298715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51789281) and next prime (51789289).

It can be written as a sum of positive squares in 2 ways, for example, as 28227969 + 23561316 = 5313^2 + 4854^2 .

It is not a de Polignac number, because 51789285 - 2² = 51789281 is a prime.

It is a super-2 number, since 2×51789285² = 5364260081622450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1150873 = 51789285 / (5 + 1 + 7 + 8 + 9 + 2 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 51789285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51789281) 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, 575392 + ... + 575481.

It is an arithmetic number, because the mean of its divisors is an integer number (7480681).

Almost surely, 2^51789285 is an apocalyptic number.

It is an amenable number.

51789285 is a deficient number, since it is larger than the sum of its proper divisors (37978887).

51789285 is a wasteful number, since it uses less digits than its factorization.

51789285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150884 (or 1150881 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 51789285 is about 7196.4772632171. The cubic root of 51789285 is about 372.7462689920.

The spelling of 51789285 in words is "fifty-one million, seven hundred eighty-nine thousand, two hundred eighty-five".