51251701 has 2 divisors, whose sum is σ = 51251702. Its totient is φ = 51251700.

The previous prime is 51251699. The next prime is 51251731. The reversal of 51251701 is 10715215.

51251701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35688676 + 15563025 = 5974^2 + 3945^2 .

It is a cyclic number.

It is not a de Polignac number, because 51251701 - 2¹ = 51251699 is a prime.

Together with 51251699, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3071623 and since 51251701 and 3071623 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51251731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25625850 + 25625851.

It is an arithmetic number, because the mean of its divisors is an integer number (25625851).

Almost surely, 2^51251701 is an apocalyptic number.

It is an amenable number.

51251701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51251701 is an equidigital number, since it uses as much as digits as its factorization.

51251701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 51251701 is about 7159.0293336457. The cubic root of 51251701 is about 371.4520515095.

Adding to 51251701 its reverse (10715215), we get a palindrome (61966916).

The spelling of 51251701 in words is "fifty-one million, two hundred fifty-one thousand, seven hundred one".