255005442 has 64 divisors (see below), whose sum is σ = 587980800. Its totient is φ = 81835920.

The previous prime is 255005431. The next prime is 255005453. The reversal of 255005442 is 244500552.

It is an interprime number because it is at equal distance from previous prime (255005431) and next prime (255005453).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580659 + ... + 581097.

It is an arithmetic number, because the mean of its divisors is an integer number (9187200).

Almost surely, 2^255005442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255005442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293990400).

255005442 is an abundant number, since it is smaller than the sum of its proper divisors (332975358).

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

255005442 is a wasteful number, since it uses less digits than its factorization.

255005442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 255005442 is about 15968.8898173918. The cubic root of 255005442 is about 634.1370815514.

Adding to 255005442 its reverse (244500552), we get a palindrome (499505994).

The spelling of 255005442 in words is "two hundred fifty-five million, five thousand, four hundred forty-two".