51242141 has 2 divisors, whose sum is σ = 51242142. Its totient is φ = 51242140.

The previous prime is 51242123. The next prime is 51242167. The reversal of 51242141 is 14124215.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 19545241 = 5630^2 + 4421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51242141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51245141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25621070 + 25621071.

It is an arithmetic number, because the mean of its divisors is an integer number (25621071).

Almost surely, 2^51242141 is an apocalyptic number.

It is an amenable number.

51242141 is a deficient number, since it is larger than the sum of its proper divisors (1).

51242141 is an equidigital number, since it uses as much as digits as its factorization.

51242141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 51242141 is about 7158.3616142243. The cubic root of 51242141 is about 371.4289543741.

Adding to 51242141 its reverse (14124215), we get a palindrome (65366356).

It can be divided in two parts, 5124214 and 1, that added together give a palindrome (5124215).

The spelling of 51242141 in words is "fifty-one million, two hundred forty-two thousand, one hundred forty-one".