51402305 has 8 divisors (see below), whose sum is σ = 65311272. Its totient is φ = 38702848.

The previous prime is 51402289. The next prime is 51402311. The reversal of 51402305 is 50320415.

It can be written as a sum of positive squares in 4 ways, for example, as 17901361 + 33500944 = 4231^2 + 5788^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51402305 - 2⁴ = 51402289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302282 + ... + 302451.

It is an arithmetic number, because the mean of its divisors is an integer number (8163909).

Almost surely, 2^51402305 is an apocalyptic number.

It is an amenable number.

51402305 is a deficient number, since it is larger than the sum of its proper divisors (13908967).

51402305 is a wasteful number, since it uses less digits than its factorization.

51402305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604755.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51402305 is about 7169.5400828784. The cubic root of 51402305 is about 371.8155351096.

The spelling of 51402305 in words is "fifty-one million, four hundred two thousand, three hundred five".