255220401 has 16 divisors (see below), whose sum is σ = 346892480. Its totient is φ = 166864320.

The previous prime is 255220393. The next prime is 255220417. The reversal of 255220401 is 104022552.

It is a happy number.

It is not a de Polignac number, because 255220401 - 2³ = 255220393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255220421) 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, 66390 + ... + 70128.

It is an arithmetic number, because the mean of its divisors is an integer number (21680780).

Almost surely, 2^255220401 is an apocalyptic number.

It is an amenable number.

255220401 is a deficient number, since it is larger than the sum of its proper divisors (91672079).

255220401 is a wasteful number, since it uses less digits than its factorization.

255220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 255220401 is about 15975.6189551454. The cubic root of 255220401 is about 634.3152152513.

Adding to 255220401 its reverse (104022552), we get a palindrome (359242953).

The spelling of 255220401 in words is "two hundred fifty-five million, two hundred twenty thousand, four hundred one".