51938280 has 64 divisors (see below), whose sum is σ = 173131200. Its totient is φ = 13849920.

The previous prime is 51938279. The next prime is 51938287. The reversal of 51938280 is 8283915.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51938287) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22966 + ... + 25125.

It is an arithmetic number, because the mean of its divisors is an integer number (2705175).

Almost surely, 2^51938280 is an apocalyptic number.

It is an amenable number.

51938280 is an abundant number, since it is smaller than the sum of its proper divisors (121192920).

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

51938280 is a wasteful number, since it uses less digits than its factorization.

51938280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48111 (or 48101 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 51938280 is about 7206.8217682970. The cubic root of 51938280 is about 373.1033837633.

The spelling of 51938280 in words is "fifty-one million, nine hundred thirty-eight thousand, two hundred eighty".