51442183 has 4 divisors (see below), whose sum is σ = 55399288. Its totient is φ = 47485080.

The previous prime is 51442169. The next prime is 51442207. The reversal of 51442183 is 38124415.

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 51442183 - 2⁹ = 51441671 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 (51442133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1978533 + ... + 1978558.

It is an arithmetic number, because the mean of its divisors is an integer number (13849822).

Almost surely, 2^51442183 is an apocalyptic number.

51442183 is a deficient number, since it is larger than the sum of its proper divisors (3957105).

51442183 is a wasteful number, since it uses less digits than its factorization.

51442183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957104.

The product of its digits is 3840, while the sum is 28.

The square root of 51442183 is about 7172.3206146965. The cubic root of 51442183 is about 371.9116619741.

Adding to 51442183 its reverse (38124415), we get a palindrome (89566598).

The spelling of 51442183 in words is "fifty-one million, four hundred forty-two thousand, one hundred eighty-three".