255513109 has 2 divisors, whose sum is σ = 255513110. Its totient is φ = 255513108.

The previous prime is 255513101. The next prime is 255513131. The reversal of 255513109 is 901315552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209612484 + 45900625 = 14478^2 + 6775^2 .

It is a cyclic number.

It is not a de Polignac number, because 255513109 - 2³ = 255513101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255513101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127756554 + 127756555.

It is an arithmetic number, because the mean of its divisors is an integer number (127756555).

Almost surely, 2^255513109 is an apocalyptic number.

It is an amenable number.

255513109 is a deficient number, since it is larger than the sum of its proper divisors (1).

255513109 is an equidigital number, since it uses as much as digits as its factorization.

255513109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 255513109 is about 15984.7774147781. Note that the first 3 decimals coincide. The cubic root of 255513109 is about 634.5576177686.

The spelling of 255513109 in words is "two hundred fifty-five million, five hundred thirteen thousand, one hundred nine".