51061 has 2 divisors, whose sum is σ = 51062.
Its totient is φ = 51060.
The previous prime is 51059. The next prime is 51071. The reversal of 51061 is 16015.
51061 = T183 + T184 +
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 28561 + 22500 = 169^2 + 150^2
It is a cyclic number.
It is not a de Polignac number, because 51061 - 21 = 51059 is a prime.
Together with 51059, it forms a pair of twin primes.
It is a Chen prime.
It is a nialpdrome in base 16.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (51001) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530 + 25531.
It is an arithmetic number, because the mean of its divisors is an integer number (25531).
251061 is an apocalyptic number.
51061 is the 185-th centered triangular number.
It is an amenable number.
51061 is a deficient number, since it is larger than the sum of its proper divisors (1).
51061 is an equidigital number, since it uses as much as digits as its factorization.
51061 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 30, while the sum is 13.
The square root of 51061 is about 225.9668117224.
The cubic root of 51061 is about 37.0990770447.
Adding to 51061 its reverse (16015), we get a palindrome (67076).
The spelling of 51061 in words is "fifty-one thousand, sixty-one".