51871410 has 72 divisors (see below), whose sum is σ = 138938436. Its totient is φ = 13426560.

The previous prime is 51871381. The next prime is 51871433. The reversal of 51871410 is 1417815.

51871410 is a `hidden beast` number, since 518 + 7 + 141 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 27279729 + 24591681 = 5223^2 + 4959^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123000 + ... + 123420.

Almost surely, 2^51871410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51871410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69469218).

51871410 is an abundant number, since it is smaller than the sum of its proper divisors (87067026).

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

51871410 is a wasteful number, since it uses less digits than its factorization.

51871410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 51871410 is about 7202.1809196937. The cubic root of 51871410 is about 372.9431927422.

The spelling of 51871410 in words is "fifty-one million, eight hundred seventy-one thousand, four hundred ten".