51704293 has 4 divisors (see below), whose sum is σ = 54745740. Its totient is φ = 48662848.

The previous prime is 51704291. The next prime is 51704297. The reversal of 51704293 is 39240715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25826724 + 25877569 = 5082^2 + 5087^2 .

It is a cyclic number.

It is not a de Polignac number, because 51704293 - 2¹ = 51704291 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51704291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520698 + ... + 1520731.

It is an arithmetic number, because the mean of its divisors is an integer number (13686435).

Almost surely, 2^51704293 is an apocalyptic number.

It is an amenable number.

51704293 is a deficient number, since it is larger than the sum of its proper divisors (3041447).

51704293 is a wasteful number, since it uses less digits than its factorization.

51704293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041446.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 51704293 is about 7190.5697270800. The cubic root of 51704293 is about 372.5422512620.

The spelling of 51704293 in words is "fifty-one million, seven hundred four thousand, two hundred ninety-three".