51288215 has 8 divisors (see below), whose sum is σ = 67141008. Its totient is φ = 37300480.

The previous prime is 51288197. The next prime is 51288217.

It is a happy number.

51288215 is nontrivially palindromic in base 10.

51288215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51288215 - 2⁸ = 51287959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51288217) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 466202 + ... + 466311.

It is an arithmetic number, because the mean of its divisors is an integer number (8392626).

Almost surely, 2^51288215 is an apocalyptic number.

51288215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51288215 is a deficient number, since it is larger than the sum of its proper divisors (15852793).

51288215 is a wasteful number, since it uses less digits than its factorization.

51288215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932529.

The product of its digits is 6400, while the sum is 32.

The square root of 51288215 is about 7161.5790856486. The cubic root of 51288215 is about 371.5402435773.

The spelling of 51288215 in words is "fifty-one million, two hundred eighty-eight thousand, two hundred fifteen".