215223242 has 16 divisors (see below), whose sum is σ = 347979240. Its totient is φ = 99244992.

The previous prime is 215223221. The next prime is 215223277. The reversal of 215223242 is 242322512.

It can be written as a sum of positive squares in 4 ways, for example, as 215179561 + 43681 = 14669^2 + 209^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32684 + ... + 38712.

Almost surely, 2^215223242 is an apocalyptic number.

215223242 is a deficient number, since it is larger than the sum of its proper divisors (132755998).

215223242 is a wasteful number, since it uses less digits than its factorization.

215223242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7417.

The product of its digits is 1920, while the sum is 23.

The square root of 215223242 is about 14670.4888125788. The cubic root of 215223242 is about 599.2799157732.

Adding to 215223242 its reverse (242322512), we get a palindrome (457545754).

The spelling of 215223242 in words is "two hundred fifteen million, two hundred twenty-three thousand, two hundred forty-two".