51021241 has 2 divisors, whose sum is σ = 51021242. Its totient is φ = 51021240.

The previous prime is 51021197. The next prime is 51021307. The reversal of 51021241 is 14212015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 21427641 = 5440^2 + 4629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51021241 is a prime.

It is not a weakly prime, because it can be changed into another prime (51021041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510620 + 25510621.

It is an arithmetic number, because the mean of its divisors is an integer number (25510621).

Almost surely, 2^51021241 is an apocalyptic number.

It is an amenable number.

51021241 is a deficient number, since it is larger than the sum of its proper divisors (1).

51021241 is an equidigital number, since it uses as much as digits as its factorization.

51021241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 51021241 is about 7142.9154411907. The cubic root of 51021241 is about 370.8944539354.

Adding to 51021241 its reverse (14212015), we get a palindrome (65233256).

The spelling of 51021241 in words is "fifty-one million, twenty-one thousand, two hundred forty-one".