51314621 has 2 divisors, whose sum is σ = 51314622. Its totient is φ = 51314620.

The previous prime is 51314531. The next prime is 51314629. The reversal of 51314621 is 12641315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35402500 + 15912121 = 5950^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 51314621 - 2¹⁰ = 51313597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51314629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25657310 + 25657311.

It is an arithmetic number, because the mean of its divisors is an integer number (25657311).

Almost surely, 2^51314621 is an apocalyptic number.

It is an amenable number.

51314621 is a deficient number, since it is larger than the sum of its proper divisors (1).

51314621 is an equidigital number, since it uses as much as digits as its factorization.

51314621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 51314621 is about 7163.4224362381. The cubic root of 51314621 is about 371.6039957695.

Adding to 51314621 its reverse (12641315), we get a palindrome (63955936).

The spelling of 51314621 in words is "fifty-one million, three hundred fourteen thousand, six hundred twenty-one".