255021191 has 8 divisors (see below), whose sum is σ = 257066880. Its totient is φ = 252982008.

The previous prime is 255021167. The next prime is 255021227. The reversal of 255021191 is 191120552.

255021191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255021191 - 2⁶ = 255021127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255021191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255021791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102140 + ... + 104606.

It is an arithmetic number, because the mean of its divisors is an integer number (32133360).

Almost surely, 2^255021191 is an apocalyptic number.

255021191 is a deficient number, since it is larger than the sum of its proper divisors (2045689).

255021191 is a wasteful number, since it uses less digits than its factorization.

255021191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 255021191 is about 15969.3829248346. The cubic root of 255021191 is about 634.1501359386.

The spelling of 255021191 in words is "two hundred fifty-five million, twenty-one thousand, one hundred ninety-one".