255115121 has 2 divisors, whose sum is σ = 255115122. Its totient is φ = 255115120.

The previous prime is 255115097. The next prime is 255115139. The reversal of 255115121 is 121511552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217120225 + 37994896 = 14735^2 + 6164^2 .

It is a cyclic number.

It is not a de Polignac number, because 255115121 - 2¹⁴ = 255098737 is a prime.

It is not a weakly prime, because it can be changed into another prime (255115181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127557560 + 127557561.

It is an arithmetic number, because the mean of its divisors is an integer number (127557561).

Almost surely, 2^255115121 is an apocalyptic number.

It is an amenable number.

255115121 is a deficient number, since it is larger than the sum of its proper divisors (1).

255115121 is an equidigital number, since it uses as much as digits as its factorization.

255115121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 500, while the sum is 23.

The square root of 255115121 is about 15972.3235942677. The cubic root of 255115121 is about 634.2279836009.

Adding to 255115121 its reverse (121511552), we get a palindrome (376626673).

The spelling of 255115121 in words is "two hundred fifty-five million, one hundred fifteen thousand, one hundred twenty-one".