255201813 has 16 divisors (see below), whose sum is σ = 394515840. Its totient is φ = 162736992.

The previous prime is 255201803. The next prime is 255201833. The reversal of 255201813 is 318102552.

It is a happy number.

It is not a de Polignac number, because 255201813 - 2⁴ = 255201797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255201803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204856 + ... + 206097.

It is an arithmetic number, because the mean of its divisors is an integer number (24657240).

Almost surely, 2^255201813 is an apocalyptic number.

255201813 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

255201813 is a deficient number, since it is larger than the sum of its proper divisors (139314027).

255201813 is a wasteful number, since it uses less digits than its factorization.

255201813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410985 (or 410979 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 255201813 is about 15975.0371830553. The cubic root of 255201813 is about 634.2998155714.

The spelling of 255201813 in words is "two hundred fifty-five million, two hundred one thousand, eight hundred thirteen".