51442293 has 16 divisors (see below), whose sum is σ = 78520320. Its totient is φ = 29346096.

The previous prime is 51442271. The next prime is 51442327. The reversal of 51442293 is 39224415.

51442293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51442293 - 2¹² = 51438197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51442293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51442243) 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 15 ways as a sum of consecutive naturals, for example, 13396 + ... + 16802.

It is an arithmetic number, because the mean of its divisors is an integer number (4907520).

Almost surely, 2^51442293 is an apocalyptic number.

It is an amenable number.

51442293 is a deficient number, since it is larger than the sum of its proper divisors (27078027).

51442293 is a wasteful number, since it uses less digits than its factorization.

51442293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136.

The product of its digits is 8640, while the sum is 30.

The square root of 51442293 is about 7172.3282830612. The cubic root of 51442293 is about 371.9119270630.

The spelling of 51442293 in words is "fifty-one million, four hundred forty-two thousand, two hundred ninety-three".