51403243 has 4 divisors (see below), whose sum is σ = 51912288. Its totient is φ = 50894200.

The previous prime is 51403207. The next prime is 51403273. The reversal of 51403243 is 34230415.

51403243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51403243 - 2¹³ = 51395051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51403273) 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 3 ways as a sum of consecutive naturals, for example, 254371 + ... + 254572.

It is an arithmetic number, because the mean of its divisors is an integer number (12978072).

Almost surely, 2^51403243 is an apocalyptic number.

51403243 is a deficient number, since it is larger than the sum of its proper divisors (509045).

51403243 is a wasteful number, since it uses less digits than its factorization.

51403243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509044.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 51403243 is about 7169.6054982126. The cubic root of 51403243 is about 371.8177967517.

Adding to 51403243 its reverse (34230415), we get a palindrome (85633658).

The spelling of 51403243 in words is "fifty-one million, four hundred three thousand, two hundred forty-three".