51304293 has 8 divisors (see below), whose sum is σ = 76006400. Its totient is φ = 34202844.

The previous prime is 51304291. The next prime is 51304333. The reversal of 51304293 is 39240315.

It is not a de Polignac number, because 51304293 - 2¹ = 51304291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1900159 = 51304293 / (5 + 1 + 3 + 0 + 4 + 2 + 9 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51304291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950053 + ... + 950106.

It is an arithmetic number, because the mean of its divisors is an integer number (9500800).

Almost surely, 2^51304293 is an apocalyptic number.

It is an amenable number.

51304293 is a deficient number, since it is larger than the sum of its proper divisors (24702107).

51304293 is a wasteful number, since it uses less digits than its factorization.

51304293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900168 (or 1900162 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 51304293 is about 7162.7015154898. The cubic root of 51304293 is about 371.5790634110.

The spelling of 51304293 in words is "fifty-one million, three hundred four thousand, two hundred ninety-three".