51407280 has 60 divisors (see below), whose sum is σ = 172645200. Its totient is φ = 13708416.

The previous prime is 51407273. The next prime is 51407281. The reversal of 51407280 is 8270415.

51407280 is a `hidden beast` number, since 514 + 0 + 72 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (51407281) 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, 34980 + ... + 36419.

It is an arithmetic number, because the mean of its divisors is an integer number (2877420).

Almost surely, 2^51407280 is an apocalyptic number.

It is an amenable number.

51407280 is an abundant number, since it is smaller than the sum of its proper divisors (121237920).

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

51407280 is a wasteful number, since it uses less digits than its factorization.

51407280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71418 (or 71409 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51407280 is about 7169.8870283987. The cubic root of 51407280 is about 371.8275301788.

Adding to 51407280 its reverse (8270415), we get a palindrome (59677695).

The spelling of 51407280 in words is "fifty-one million, four hundred seven thousand, two hundred eighty".