51220760 has 16 divisors (see below), whose sum is σ = 115246800. Its totient is φ = 20488288.

The previous prime is 51220759. The next prime is 51220769. The reversal of 51220760 is 6702215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640220 + ... + 640299.

It is an arithmetic number, because the mean of its divisors is an integer number (7202925).

Almost surely, 2^51220760 is an apocalyptic number.

It is an amenable number.

51220760 is an abundant number, since it is smaller than the sum of its proper divisors (64026040).

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

51220760 is a wasteful number, since it uses less digits than its factorization.

51220760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280530 (or 1280526 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51220760 is about 7156.8680300813. The cubic root of 51220760 is about 371.3772870867.

Adding to 51220760 its reverse (6702215), we get a palindrome (57922975).

The spelling of 51220760 in words is "fifty-one million, two hundred twenty thousand, seven hundred sixty".