51249589 has 4 divisors (see below), whose sum is σ = 53477856. Its totient is φ = 49021324.

The previous prime is 51249587. The next prime is 51249619. The reversal of 51249589 is 98594215.

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 a cyclic number.

It is not a de Polignac number, because 51249589 - 2¹ = 51249587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51249581) 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 3 ways as a sum of consecutive naturals, for example, 1114099 + ... + 1114144.

It is an arithmetic number, because the mean of its divisors is an integer number (13369464).

Almost surely, 2^51249589 is an apocalyptic number.

It is an amenable number.

51249589 is a deficient number, since it is larger than the sum of its proper divisors (2228267).

51249589 is a wasteful number, since it uses less digits than its factorization.

51249589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228266.

The product of its digits is 129600, while the sum is 43.

The square root of 51249589 is about 7158.8818260955. The cubic root of 51249589 is about 371.4469491259.

The spelling of 51249589 in words is "fifty-one million, two hundred forty-nine thousand, five hundred eighty-nine".