51255161 has 2 divisors, whose sum is σ = 51255162. Its totient is φ = 51255160.

The previous prime is 51255143. The next prime is 51255173. The reversal of 51255161 is 16155215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34445161 + 16810000 = 5869^2 + 4100^2 .

It is a cyclic number.

It is not a de Polignac number, because 51255161 - 2¹⁴ = 51238777 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51255161.

It is not a weakly prime, because it can be changed into another prime (51255361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25627580 + 25627581.

It is an arithmetic number, because the mean of its divisors is an integer number (25627581).

Almost surely, 2^51255161 is an apocalyptic number.

It is an amenable number.

51255161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51255161 is an equidigital number, since it uses as much as digits as its factorization.

51255161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500, while the sum is 26.

The square root of 51255161 is about 7159.2709824395. The cubic root of 51255161 is about 371.4604102251.

The spelling of 51255161 in words is "fifty-one million, two hundred fifty-five thousand, one hundred sixty-one".