51240960 has 168 divisors, whose sum is σ = 178902360. Its totient is φ = 13565952.

The previous prime is 51240953. The next prime is 51240961. The reversal of 51240960 is 6904215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368571 + ... + 368709.

It is an arithmetic number, because the mean of its divisors is an integer number (1064895).

Almost surely, 2^51240960 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 51240960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89451180).

51240960 is an abundant number, since it is smaller than the sum of its proper divisors (127661400).

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

51240960 is a wasteful number, since it uses less digits than its factorization.

51240960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 149 counting only the distinct ones).

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

The square root of 51240960 is about 7158.2791228060. The cubic root of 51240960 is about 371.4261008571.

The spelling of 51240960 in words is "fifty-one million, two hundred forty thousand, nine hundred sixty".