51571560 has 64 divisors (see below), whose sum is σ = 156919680. Its totient is φ = 13556480.

The previous prime is 51571547. The next prime is 51571573. The reversal of 51571560 is 6517515.

51571560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51571547) and next prime (51571573).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5494 + ... + 11546.

It is an arithmetic number, because the mean of its divisors is an integer number (2451870).

Almost surely, 2^51571560 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 51571560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78459840).

51571560 is an abundant number, since it is smaller than the sum of its proper divisors (105348120).

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

51571560 is a wasteful number, since it uses less digits than its factorization.

51571560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138 (or 6134 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 51571560 is about 7181.3341378883. The cubic root of 51571560 is about 372.2231866843.

The spelling of 51571560 in words is "fifty-one million, five hundred seventy-one thousand, five hundred sixty".