51971360 has 96 divisors (see below), whose sum is σ = 143337600. Its totient is φ = 17799936.

The previous prime is 51971357. The next prime is 51971369. The reversal of 51971360 is 6317915.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (51971369) 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, 54407 + ... + 55353.

It is an arithmetic number, because the mean of its divisors is an integer number (1493100).

Almost surely, 2^51971360 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51971360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71668800).

51971360 is an abundant number, since it is smaller than the sum of its proper divisors (91366240).

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

51971360 is an equidigital number, since it uses as much as digits as its factorization.

51971360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 51971360 is about 7209.1164507171. The cubic root of 51971360 is about 373.1825780208.

The spelling of 51971360 in words is "fifty-one million, nine hundred seventy-one thousand, three hundred sixty".