51383663 has 4 divisors (see below), whose sum is σ = 51518208. Its totient is φ = 51249120.

The previous prime is 51383617. The next prime is 51383669. The reversal of 51383663 is 36638315.

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 51383663 - 2⁶ = 51383599 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 (51383669) 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, 66698 + ... + 67463.

It is an arithmetic number, because the mean of its divisors is an integer number (12879552).

Almost surely, 2^51383663 is an apocalyptic number.

51383663 is a deficient number, since it is larger than the sum of its proper divisors (134545).

51383663 is a wasteful number, since it uses less digits than its factorization.

51383663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134544.

The product of its digits is 38880, while the sum is 35.

The square root of 51383663 is about 7168.2398815888. The cubic root of 51383663 is about 371.7705810730.

The spelling of 51383663 in words is "fifty-one million, three hundred eighty-three thousand, six hundred sixty-three".