51072760 has 128 divisors (see below), whose sum is σ = 132192000. Its totient is φ = 17639424.

The previous prime is 51072751. The next prime is 51072767. The reversal of 51072760 is 6727015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 762247 + ... + 762313.

It is an arithmetic number, because the mean of its divisors is an integer number (1032750).

Almost surely, 2^51072760 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 51072760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66096000).

51072760 is an abundant number, since it is smaller than the sum of its proper divisors (81119240).

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

51072760 is a wasteful number, since it uses less digits than its factorization.

51072760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 51072760 is about 7146.5208318454. The cubic root of 51072760 is about 371.0192495637.

Adding to 51072760 its reverse (6727015), we get a palindrome (57799775).

The spelling of 51072760 in words is "fifty-one million, seventy-two thousand, seven hundred sixty".