51420360 has 32 divisors (see below), whose sum is σ = 154261440. Its totient is φ = 13712064.

The previous prime is 51420337. The next prime is 51420361. The reversal of 51420360 is 6302415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51420361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214132 + ... + 214371.

It is an arithmetic number, because the mean of its divisors is an integer number (4820670).

Almost surely, 2^51420360 is an apocalyptic number.

It is an amenable number.

51420360 is an abundant number, since it is smaller than the sum of its proper divisors (102841080).

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

51420360 is a wasteful number, since it uses less digits than its factorization.

51420360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428517 (or 428513 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51420360 is about 7170.7991186478. The cubic root of 51420360 is about 371.8590632720.

Adding to 51420360 its reverse (6302415), we get a palindrome (57722775).

The spelling of 51420360 in words is "fifty-one million, four hundred twenty thousand, three hundred sixty".