215223232 has 28 divisors (see below), whose sum is σ = 488096560. Its totient is φ = 92238336.

The previous prime is 215223221. The next prime is 215223277. The reversal of 215223232 is 232322512.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239757 + ... + 240652.

It is an arithmetic number, because the mean of its divisors is an integer number (17432020).

Almost surely, 2^215223232 is an apocalyptic number.

It is an amenable number.

215223232 is an abundant number, since it is smaller than the sum of its proper divisors (272873328).

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

215223232 is an equidigital number, since it uses as much as digits as its factorization.

215223232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480428 (or 480418 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 215223232 is about 14670.4884717585. The cubic root of 215223232 is about 599.2799064917.

Adding to 215223232 its reverse (232322512), we get a palindrome (447545744).

The spelling of 215223232 in words is "two hundred fifteen million, two hundred twenty-three thousand, two hundred thirty-two".