51884881 has 2 divisors, whose sum is σ = 51884882. Its totient is φ = 51884880.

The previous prime is 51884879. The next prime is 51884891. The reversal of 51884881 is 18848815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28998225 + 22886656 = 5385^2 + 4784^2 .

It is a cyclic number.

It is not a de Polignac number, because 51884881 - 2¹ = 51884879 is a prime.

It is a super-2 number, since 2×51884881² = 5384081752768322, which contains 22 as substring.

Together with 51884879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51884821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25942440 + 25942441.

It is an arithmetic number, because the mean of its divisors is an integer number (25942441).

Almost surely, 2^51884881 is an apocalyptic number.

It is an amenable number.

51884881 is a deficient number, since it is larger than the sum of its proper divisors (1).

51884881 is an equidigital number, since it uses as much as digits as its factorization.

51884881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81920, while the sum is 43.

The square root of 51884881 is about 7203.1160618166. The cubic root of 51884881 is about 372.9754743845.

The spelling of 51884881 in words is "fifty-one million, eight hundred eighty-four thousand, eight hundred eighty-one".