51384156 has 12 divisors (see below), whose sum is σ = 119896392. Its totient is φ = 17128048.

The previous prime is 51384133. The next prime is 51384161. The reversal of 51384156 is 65148315.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2140995 + ... + 2141018.

It is an arithmetic number, because the mean of its divisors is an integer number (9991366).

Almost surely, 2^51384156 is an apocalyptic number.

It is an amenable number.

51384156 is an abundant number, since it is smaller than the sum of its proper divisors (68512236).

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

51384156 is a wasteful number, since it uses less digits than its factorization.

51384156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282020 (or 4282018 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 51384156 is about 7168.2742693064. The cubic root of 51384156 is about 371.7717700521.

The spelling of 51384156 in words is "fifty-one million, three hundred eighty-four thousand, one hundred fifty-six".