51380428 has 24 divisors (see below), whose sum is σ = 99477504. Its totient is φ = 23024400.

The previous prime is 51380369. The next prime is 51380429. The reversal of 51380428 is 82408315.

It is a self number, because there is not a number n which added to its sum of digits gives 51380428.

It is not an unprimeable number, because it can be changed into a prime (51380429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5100 + ... + 11347.

It is an arithmetic number, because the mean of its divisors is an integer number (4144896).

Almost surely, 2^51380428 is an apocalyptic number.

It is an amenable number.

51380428 is a deficient number, since it is larger than the sum of its proper divisors (48097076).

51380428 is a wasteful number, since it uses less digits than its factorization.

51380428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16533 (or 16531 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 51380428 is about 7168.0142298966. The cubic root of 51380428 is about 371.7627789623.

The spelling of 51380428 in words is "fifty-one million, three hundred eighty thousand, four hundred twenty-eight".