51245589 has 4 divisors (see below), whose sum is σ = 68327456. Its totient is φ = 34163724.

The previous prime is 51245569. The next prime is 51245591. The reversal of 51245589 is 98554215.

51245589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51245589 - 2⁷ = 51245461 is a prime.

It is a super-2 number, since 2×51245589² = 5252220783913842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8540929 + ... + 8540934.

It is an arithmetic number, because the mean of its divisors is an integer number (17081864).

Almost surely, 2^51245589 is an apocalyptic number.

It is an amenable number.

51245589 is a deficient number, since it is larger than the sum of its proper divisors (17081867).

51245589 is a wasteful number, since it uses less digits than its factorization.

51245589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17081866.

The product of its digits is 72000, while the sum is 39.

The square root of 51245589 is about 7158.6024474055. The cubic root of 51245589 is about 371.4372851365.

The spelling of 51245589 in words is "fifty-one million, two hundred forty-five thousand, five hundred eighty-nine".