51442331 has 8 divisors (see below), whose sum is σ = 52936800. Its totient is φ = 49959360.

The previous prime is 51442327. The next prime is 51442333. The reversal of 51442331 is 13324415.

51442331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51442331 - 2² = 51442327 is a prime.

It is a super-2 number, since 2×51442331² = 5292626837427122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51442297 and 51442306.

It is not an unprimeable number, because it can be changed into a prime (51442333) 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 7 ways as a sum of consecutive naturals, for example, 6650 + ... + 12128.

It is an arithmetic number, because the mean of its divisors is an integer number (6617100).

Almost surely, 2^51442331 is an apocalyptic number.

51442331 is a deficient number, since it is larger than the sum of its proper divisors (1494469).

51442331 is a wasteful number, since it uses less digits than its factorization.

51442331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5749.

The product of its digits is 1440, while the sum is 23.

The square root of 51442331 is about 7172.3309321308. The cubic root of 51442331 is about 371.9120186390.

Adding to 51442331 its reverse (13324415), we get a palindrome (64766746).

The spelling of 51442331 in words is "fifty-one million, four hundred forty-two thousand, three hundred thirty-one".