51442245 has 12 divisors (see below), whose sum is σ = 89166636. Its totient is φ = 27435840.

The previous prime is 51442243. The next prime is 51442271. The reversal of 51442245 is 54224415.

It can be written as a sum of positive squares in 2 ways, for example, as 40373316 + 11068929 = 6354^2 + 3327^2 .

It is not a de Polignac number, because 51442245 - 2¹ = 51442243 is a prime.

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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 571536 + ... + 571625.

It is an arithmetic number, because the mean of its divisors is an integer number (7430553).

Almost surely, 2^51442245 is an apocalyptic number.

It is an amenable number.

51442245 is a deficient number, since it is larger than the sum of its proper divisors (37724391).

51442245 is a wasteful number, since it uses less digits than its factorization.

51442245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143172 (or 1143169 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 51442245 is about 7172.3249368667. The cubic root of 51442245 is about 371.9118113879.

The spelling of 51442245 in words is "fifty-one million, four hundred forty-two thousand, two hundred forty-five".