51801378 has 32 divisors (see below), whose sum is σ = 105705600. Its totient is φ = 16920576.

The previous prime is 51801377. The next prime is 51801401. The reversal of 51801378 is 87310815.

It is not an unprimeable number, because it can be changed into a prime (51801371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66978 + ... + 67746.

It is an arithmetic number, because the mean of its divisors is an integer number (3303300).

Almost surely, 2^51801378 is an apocalyptic number.

51801378 is an abundant number, since it is smaller than the sum of its proper divisors (53904222).

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

51801378 is a wasteful number, since it uses less digits than its factorization.

51801378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 51801378 is about 7197.3174169269. The cubic root of 51801378 is about 372.7752793032.

The spelling of 51801378 in words is "fifty-one million, eight hundred one thousand, three hundred seventy-eight".