51016439 has 4 divisors (see below), whose sum is σ = 54017424. Its totient is φ = 48015456.

The previous prime is 51016417. The next prime is 51016453. The reversal of 51016439 is 93461015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51016439 - 2¹⁶ = 50950903 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 (51016409) 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, 1500467 + ... + 1500500.

It is an arithmetic number, because the mean of its divisors is an integer number (13504356).

Almost surely, 2^51016439 is an apocalyptic number.

51016439 is a deficient number, since it is larger than the sum of its proper divisors (3000985).

51016439 is a wasteful number, since it uses less digits than its factorization.

51016439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000984.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 51016439 is about 7142.5792960247. The cubic root of 51016439 is about 370.8828176639.

The spelling of 51016439 in words is "fifty-one million, sixteen thousand, four hundred thirty-nine".