51831360 has 224 divisors, whose sum is σ = 209214720. Its totient is φ = 11833344.

The previous prime is 51831331. The next prime is 51831361. The reversal of 51831360 is 6313815.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51831361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60052 + ... + 60908.

Almost surely, 2^51831360 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 51831360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104607360).

51831360 is an abundant number, since it is smaller than the sum of its proper divisors (157383360).

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

51831360 is a wasteful number, since it uses less digits than its factorization.

51831360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51831360 is about 7199.3999749979. The cubic root of 51831360 is about 372.8471846802.

It can be divided in two parts, 518 and 31360, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 51831360 in words is "fifty-one million, eight hundred thirty-one thousand, three hundred sixty".