51476240 has 20 divisors (see below), whose sum is σ = 119682444. Its totient is φ = 20590464.

The previous prime is 51476239. The next prime is 51476273. The reversal of 51476240 is 4267415.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 39337984 = 3484^2 + 6272^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321647 + ... + 321806.

Almost surely, 2^51476240 is an apocalyptic number.

It is an amenable number.

51476240 is an abundant number, since it is smaller than the sum of its proper divisors (68206204).

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

51476240 is a wasteful number, since it uses less digits than its factorization.

51476240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643466 (or 643460 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 51476240 is about 7174.6944185798. The cubic root of 51476240 is about 371.9937178575.

The spelling of 51476240 in words is "fifty-one million, four hundred seventy-six thousand, two hundred forty".