51744321 has 12 divisors (see below), whose sum is σ = 76332672. Its totient is φ = 33761976.

The previous prime is 51744313. The next prime is 51744331. The reversal of 51744321 is 12344715.

It is not a de Polignac number, because 51744321 - 2³ = 51744313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51744331) 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 11 ways as a sum of consecutive naturals, for example, 60741 + ... + 61586.

It is an arithmetic number, because the mean of its divisors is an integer number (6361056).

Almost surely, 2^51744321 is an apocalyptic number.

It is an amenable number.

51744321 is a deficient number, since it is larger than the sum of its proper divisors (24588351).

51744321 is a wasteful number, since it uses less digits than its factorization.

51744321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122380 (or 122377 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51744321 is about 7193.3525563537. The cubic root of 51744321 is about 372.6383636854.

The spelling of 51744321 in words is "fifty-one million, seven hundred forty-four thousand, three hundred twenty-one".