51402415 has 8 divisors (see below), whose sum is σ = 63117648. Its totient is φ = 40165440.

The previous prime is 51402409. The next prime is 51402437. The reversal of 51402415 is 51420415.

51402415 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 51402415 - 2¹⁷ = 51271343 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 119326 + ... + 119755.

It is an arithmetic number, because the mean of its divisors is an integer number (7889706).

Almost surely, 2^51402415 is an apocalyptic number.

51402415 is a deficient number, since it is larger than the sum of its proper divisors (11715233).

51402415 is a wasteful number, since it uses less digits than its factorization.

51402415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239129.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 51402415 is about 7169.5477542171. The cubic root of 51402415 is about 371.8158003356.

The spelling of 51402415 in words is "fifty-one million, four hundred two thousand, four hundred fifteen".