51563783 has 4 divisors (see below), whose sum is σ = 51580128. Its totient is φ = 51547440.

The previous prime is 51563779. The next prime is 51563789. The reversal of 51563783 is 38736515.

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 51563783 - 2² = 51563779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51563789) 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, 1766 + ... + 10307.

It is an arithmetic number, because the mean of its divisors is an integer number (12895032).

Almost surely, 2^51563783 is an apocalyptic number.

51563783 is a deficient number, since it is larger than the sum of its proper divisors (16345).

51563783 is a wasteful number, since it uses less digits than its factorization.

51563783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16344.

The product of its digits is 75600, while the sum is 38.

The square root of 51563783 is about 7180.7926442699. The cubic root of 51563783 is about 372.2044753038.

The spelling of 51563783 in words is "fifty-one million, five hundred sixty-three thousand, seven hundred eighty-three".