51984013 has 4 divisors (see below), whose sum is σ = 52011388. Its totient is φ = 51956640.

The previous prime is 51984007. The next prime is 51984029. The reversal of 51984013 is 31048915.

51984013 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.

It can be written as a sum of positive squares in 2 ways, for example, as 34786404 + 17197609 = 5898^2 + 4147^2 .

It is a cyclic number.

It is not a de Polignac number, because 51984013 - 2¹³ = 51975821 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 (51984083) 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, 10608 + ... + 14713.

It is an arithmetic number, because the mean of its divisors is an integer number (13002847).

Almost surely, 2^51984013 is an apocalyptic number.

It is an amenable number.

51984013 is a deficient number, since it is larger than the sum of its proper divisors (27375).

51984013 is a wasteful number, since it uses less digits than its factorization.

51984013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27374.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 51984013 is about 7209.9939667104. The cubic root of 51984013 is about 373.2128606996.

It can be divided in two parts, 51 and 984013, that added together give a square (984064 = 992²).

The spelling of 51984013 in words is "fifty-one million, nine hundred eighty-four thousand, thirteen".