255161617 has 2 divisors, whose sum is σ = 255161618. Its totient is φ = 255161616.

The previous prime is 255161587. The next prime is 255161629. The reversal of 255161617 is 716161552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236421376 + 18740241 = 15376^2 + 4329^2 .

It is a cyclic number.

It is not a de Polignac number, because 255161617 - 2¹⁵ = 255128849 is a prime.

It is not a weakly prime, because it can be changed into another prime (255161677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127580808 + 127580809.

It is an arithmetic number, because the mean of its divisors is an integer number (127580809).

Almost surely, 2^255161617 is an apocalyptic number.

It is an amenable number.

255161617 is a deficient number, since it is larger than the sum of its proper divisors (1).

255161617 is an equidigital number, since it uses as much as digits as its factorization.

255161617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 34.

The square root of 255161617 is about 15973.7790456736. The cubic root of 255161617 is about 634.2665116621.

The spelling of 255161617 in words is "two hundred fifty-five million, one hundred sixty-one thousand, six hundred seventeen".