255241021 has 16 divisors (see below), whose sum is σ = 300441600. Its totient is φ = 212320368.

The previous prime is 255241013. The next prime is 255241061. The reversal of 255241021 is 120142552.

It is a cyclic number.

It is not a de Polignac number, because 255241021 - 2³ = 255241013 is a prime.

It is a super-2 number, since 2×255241021² = 130295957602244882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255240983 and 255241001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255241061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28716 + ... + 36538.

It is an arithmetic number, because the mean of its divisors is an integer number (18777600).

Almost surely, 2^255241021 is an apocalyptic number.

It is an amenable number.

255241021 is a deficient number, since it is larger than the sum of its proper divisors (45200579).

255241021 is an equidigital number, since it uses as much as digits as its factorization.

255241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 255241021 is about 15976.2643005178. The cubic root of 255241021 is about 634.3322975163.

Adding to 255241021 its reverse (120142552), we get a palindrome (375383573).

The spelling of 255241021 in words is "two hundred fifty-five million, two hundred forty-one thousand, twenty-one".