51303881 has 2 divisors, whose sum is σ = 51303882. Its totient is φ = 51303880.

The previous prime is 51303851. The next prime is 51303887. The reversal of 51303881 is 18830315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36711481 + 14592400 = 6059^2 + 3820^2 .

It is a cyclic number.

It is not a de Polignac number, because 51303881 - 2⁶ = 51303817 is a prime.

It is a super-2 number, since 2×51303881² = 5264176411324322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51303887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25651940 + 25651941.

It is an arithmetic number, because the mean of its divisors is an integer number (25651941).

Almost surely, 2^51303881 is an apocalyptic number.

It is an amenable number.

51303881 is a deficient number, since it is larger than the sum of its proper divisors (1).

51303881 is an equidigital number, since it uses as much as digits as its factorization.

51303881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 51303881 is about 7162.6727553337. The cubic root of 51303881 is about 371.5780687510.

The spelling of 51303881 in words is "fifty-one million, three hundred three thousand, eight hundred eighty-one".