51871560 has 128 divisors (see below), whose sum is σ = 171884160. Its totient is φ = 12441600.

The previous prime is 51871559. The next prime is 51871571. The reversal of 51871560 is 6517815.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63555 + ... + 64365.

It is an arithmetic number, because the mean of its divisors is an integer number (1342845).

Almost surely, 2^51871560 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 51871560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85942080).

51871560 is an abundant number, since it is smaller than the sum of its proper divisors (120012600).

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

51871560 is a wasteful number, since it uses less digits than its factorization.

51871560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 51871560 is about 7202.1913331985. The cubic root of 51871560 is about 372.9435522301.

The spelling of 51871560 in words is "fifty-one million, eight hundred seventy-one thousand, five hundred sixty".