51000641 has 2 divisors, whose sum is σ = 51000642. Its totient is φ = 51000640.

The previous prime is 51000619. The next prime is 51000643. The reversal of 51000641 is 14600015.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 92416 = 7135^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 51000641 - 2¹⁰ = 50999617 is a prime.

Together with 51000643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51000643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500320 + 25500321.

It is an arithmetic number, because the mean of its divisors is an integer number (25500321).

Almost surely, 2^51000641 is an apocalyptic number.

It is an amenable number.

51000641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51000641 is an equidigital number, since it uses as much as digits as its factorization.

51000641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51000641 is about 7141.4733073785. The cubic root of 51000641 is about 370.8445305825.

Adding to 51000641 its reverse (14600015), we get a palindrome (65600656).

The spelling of 51000641 in words is "fifty-one million, six hundred forty-one", and thus it is an aban number.