51369312 has 48 divisors (see below), whose sum is σ = 141946560. Its totient is φ = 16221312.

The previous prime is 51369239. The next prime is 51369319. The reversal of 51369312 is 21396315.

51369312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51369312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51369319) 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 7 ways as a sum of consecutive naturals, for example, 12258 + ... + 15905.

It is an arithmetic number, because the mean of its divisors is an integer number (2957220).

Almost surely, 2^51369312 is an apocalyptic number.

It is an amenable number.

51369312 is an abundant number, since it is smaller than the sum of its proper divisors (90577248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51369312 is a wasteful number, since it uses less digits than its factorization.

51369312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28195 (or 28187 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 51369312 is about 7167.2387988681. The cubic root of 51369312 is about 371.7359671115.

It can be divided in two parts, 51369 and 312, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 51369312 in words is "fifty-one million, three hundred sixty-nine thousand, three hundred twelve".