255221430 has 32 divisors (see below), whose sum is σ = 613958400. Its totient is φ = 67900512.

The previous prime is 255221413. The next prime is 255221441. The reversal of 255221430 is 34122552.

It is a self number, because there is not a number n which added to its sum of digits gives 255221430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3481 + ... + 22859.

It is an arithmetic number, because the mean of its divisors is an integer number (19186200).

Almost surely, 2^255221430 is an apocalyptic number.

255221430 is an abundant number, since it is smaller than the sum of its proper divisors (358736970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255221430 is a wasteful number, since it uses less digits than its factorization.

255221430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19828.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 255221430 is about 15975.6511604379. The cubic root of 255221430 is about 634.3160677295.

Adding to 255221430 its reverse (34122552), we get a palindrome (289343982).

The spelling of 255221430 in words is "two hundred fifty-five million, two hundred twenty-one thousand, four hundred thirty".