51242144 has 12 divisors (see below), whose sum is σ = 100883034. Its totient is φ = 25621056.

The previous prime is 51242141. The next prime is 51242167. The reversal of 51242144 is 44124215.

It can be written as a sum of positive squares in only one way, i.e., 48720400 + 2521744 = 6980^2 + 1588^2 .

It is not an unprimeable number, because it can be changed into a prime (51242141) 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 as a sum of consecutive naturals, namely, 800627 + ... + 800690.

Almost surely, 2^51242144 is an apocalyptic number.

It is an amenable number.

51242144 is a deficient number, since it is larger than the sum of its proper divisors (49640890).

51242144 is a wasteful number, since it uses less digits than its factorization.

51242144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601327 (or 1601319 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 51242144 is about 7158.3618237695. The cubic root of 51242144 is about 371.4289616226.

Adding to 51242144 its reverse (44124215), we get a palindrome (95366359).

The spelling of 51242144 in words is "fifty-one million, two hundred forty-two thousand, one hundred forty-four".