51405360 has 40 divisors (see below), whose sum is σ = 159357360. Its totient is φ = 13708032.

The previous prime is 51405353. The next prime is 51405373. The reversal of 51405360 is 6350415.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×51405360² = 5285022073459200, which contains 22 as substring.

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 51405360.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106855 + ... + 107334.

It is an arithmetic number, because the mean of its divisors is an integer number (3983934).

Almost surely, 2^51405360 is an apocalyptic number.

It is an amenable number.

51405360 is an abundant number, since it is smaller than the sum of its proper divisors (107952000).

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

51405360 is a wasteful number, since it uses less digits than its factorization.

51405360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214205 (or 214199 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51405360 is about 7169.7531338255. The cubic root of 51405360 is about 371.8229010176.

Adding to 51405360 its reverse (6350415), we get a palindrome (57755775).

The spelling of 51405360 in words is "fifty-one million, four hundred five thousand, three hundred sixty".