51724549 has 4 divisors (see below), whose sum is σ = 52208064. Its totient is φ = 51241036.

The previous prime is 51724531. The next prime is 51724559. The reversal of 51724549 is 94542715.

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 51724549 - 2⁹ = 51724037 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 (51724529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241597 + ... + 241810.

It is an arithmetic number, because the mean of its divisors is an integer number (13052016).

Almost surely, 2^51724549 is an apocalyptic number.

It is an amenable number.

51724549 is a deficient number, since it is larger than the sum of its proper divisors (483515).

51724549 is a wasteful number, since it uses less digits than its factorization.

51724549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483514.

The product of its digits is 50400, while the sum is 37.

The square root of 51724549 is about 7191.9781006341. The cubic root of 51724549 is about 372.5908947444.

The spelling of 51724549 in words is "fifty-one million, seven hundred twenty-four thousand, five hundred forty-nine".