51520560 has 240 divisors, whose sum is σ = 200674656. Its totient is φ = 10838016.

The previous prime is 51520499. The next prime is 51520583. The reversal of 51520560 is 6502515.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 51520560.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152712 + ... + 153048.

Almost surely, 2^51520560 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 51520560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100337328).

51520560 is an abundant number, since it is smaller than the sum of its proper divisors (149154096).

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

51520560 is a wasteful number, since it uses less digits than its factorization.

51520560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51520560 is about 7177.7823873394. The cubic root of 51520560 is about 372.1004469183.

The spelling of 51520560 in words is "fifty-one million, five hundred twenty thousand, five hundred sixty".