255531432 has 64 divisors (see below), whose sum is σ = 690036480. Its totient is φ = 78388992.

The previous prime is 255531401. The next prime is 255531443. The reversal of 255531432 is 234135552.

It is a self number, because there is not a number n which added to its sum of digits gives 255531432.

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, 122833 + ... + 124895.

It is an arithmetic number, because the mean of its divisors is an integer number (10781820).

Almost surely, 2^255531432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255531432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345018240).

255531432 is an abundant number, since it is smaller than the sum of its proper divisors (434505048).

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

255531432 is a wasteful number, since it uses less digits than its factorization.

255531432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482 (or 2478 counting only the distinct ones).

The product of its digits is 18000, while the sum is 30.

The square root of 255531432 is about 15985.3505435445. The cubic root of 255531432 is about 634.5727855765.

Adding to 255531432 its reverse (234135552), we get a palindrome (489666984).

The spelling of 255531432 in words is "two hundred fifty-five million, five hundred thirty-one thousand, four hundred thirty-two".