51207408 has 120 divisors (see below), whose sum is σ = 168331488. Its totient is φ = 14224896.

The previous prime is 51207391. The next prime is 51207421. The reversal of 51207408 is 80470215.

51207408 is a `hidden beast` number, since 51 + 207 + 408 = 666.

51207408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36610 + ... + 37982.

Almost surely, 2^51207408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51207408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84165744).

51207408 is an abundant number, since it is smaller than the sum of its proper divisors (117124080).

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

51207408 is a wasteful number, since it uses less digits than its factorization.

51207408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431 (or 1422 counting only the distinct ones).

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

The square root of 51207408 is about 7155.9351590131. The cubic root of 51207408 is about 371.3450146223.

It can be divided in two parts, 51207 and 408, that added together give a palindrome (51615).

The spelling of 51207408 in words is "fifty-one million, two hundred seven thousand, four hundred eight".