255121013 has 4 divisors (see below), whose sum is σ = 291566880. Its totient is φ = 218675148.

The previous prime is 255121007. The next prime is 255121049. The reversal of 255121013 is 310121552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255121013 - 2⁴ = 255120997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18222923 + ... + 18222936.

It is an arithmetic number, because the mean of its divisors is an integer number (72891720).

Almost surely, 2^255121013 is an apocalyptic number.

It is an amenable number.

255121013 is a deficient number, since it is larger than the sum of its proper divisors (36445867).

255121013 is an equidigital number, since it uses as much as digits as its factorization.

255121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36445866.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 255121013 is about 15972.5080372495. The cubic root of 255121013 is about 634.2328661581.

Adding to 255121013 its reverse (310121552), we get a palindrome (565242565).

The spelling of 255121013 in words is "two hundred fifty-five million, one hundred twenty-one thousand, thirteen".