255615222 has 48 divisors (see below), whose sum is σ = 534306240. Its totient is φ = 81518304.

The previous prime is 255615221. The next prime is 255615229. The reversal of 255615222 is 222516552.

It is a self number, because there is not a number n which added to its sum of digits gives 255615222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255615221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 903093 + ... + 903375.

It is an arithmetic number, because the mean of its divisors is an integer number (11131380).

Almost surely, 2^255615222 is an apocalyptic number.

255615222 is an abundant number, since it is smaller than the sum of its proper divisors (278691018).

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

255615222 is a wasteful number, since it uses less digits than its factorization.

255615222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 496 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 255615222 is about 15987.9711658484. The cubic root of 255615222 is about 634.6421378315.

The spelling of 255615222 in words is "two hundred fifty-five million, six hundred fifteen thousand, two hundred twenty-two".