51512589 has 6 divisors (see below), whose sum is σ = 74407086. Its totient is φ = 34341720.

The previous prime is 51512569. The next prime is 51512599. The reversal of 51512589 is 98521515.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 51236964 + 275625 = 7158^2 + 525^2 .

It is not a de Polignac number, because 51512589 - 2⁵ = 51512557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2861802 + ... + 2861819.

It is an arithmetic number, because the mean of its divisors is an integer number (12401181).

Almost surely, 2^51512589 is an apocalyptic number.

It is an amenable number.

51512589 is a deficient number, since it is larger than the sum of its proper divisors (22894497).

51512589 is a wasteful number, since it uses less digits than its factorization.

51512589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5723627 (or 5723624 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 51512589 is about 7177.2271107998. The cubic root of 51512589 is about 372.0812560966.

The spelling of 51512589 in words is "fifty-one million, five hundred twelve thousand, five hundred eighty-nine".