255222400 has 48 divisors (see below), whose sum is σ = 630486990. Its totient is φ = 102087680.

The previous prime is 255222389. The next prime is 255222437. The reversal of 255222400 is 4222552.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 206669376 + 48553024 = 14376^2 + 6968^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36679 + ... + 43078.

Almost surely, 2^255222400 is an apocalyptic number.

255222400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255222400 is an abundant number, since it is smaller than the sum of its proper divisors (375264590).

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

255222400 is an equidigital number, since it uses as much as digits as its factorization.

255222400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79781 (or 79764 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 255222400 is about 15975.6815191090. The cubic root of 255222400 is about 634.3168713269.

Adding to 255222400 its reverse (4222552), we get a palindrome (259444952).

The spelling of 255222400 in words is "two hundred fifty-five million, two hundred twenty-two thousand, four hundred".