51882121 has 2 divisors, whose sum is σ = 51882122. Its totient is φ = 51882120.

The previous prime is 51882119. The next prime is 51882133. The reversal of 51882121 is 12128815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 3370896 = 6965^2 + 1836^2 .

It is a cyclic number.

It is not a de Polignac number, because 51882121 - 2¹ = 51882119 is a prime.

Together with 51882119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51882121.

It is not a weakly prime, because it can be changed into another prime (51882101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25941060 + 25941061.

It is an arithmetic number, because the mean of its divisors is an integer number (25941061).

Almost surely, 2^51882121 is an apocalyptic number.

It is an amenable number.

51882121 is a deficient number, since it is larger than the sum of its proper divisors (1).

51882121 is an equidigital number, since it uses as much as digits as its factorization.

51882121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 28.

The square root of 51882121 is about 7202.9244755169. The cubic root of 51882121 is about 372.9688608294.

It can be divided in two parts, 51882 and 121, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 51882121 in words is "fifty-one million, eight hundred eighty-two thousand, one hundred twenty-one".