215345056 has 12 divisors (see below), whose sum is σ = 423960642. Its totient is φ = 107672512.

The previous prime is 215345033. The next prime is 215345057. The reversal of 215345056 is 650543512.

It can be written as a sum of positive squares in only one way, i.e., 205635600 + 9709456 = 14340^2 + 3116^2 .

It is not an unprimeable number, because it can be changed into a prime (215345057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364735 + ... + 3364798.

Almost surely, 2^215345056 is an apocalyptic number.

It is an amenable number.

215345056 is a deficient number, since it is larger than the sum of its proper divisors (208615586).

215345056 is an equidigital number, since it uses as much as digits as its factorization.

215345056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729543 (or 6729535 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 215345056 is about 14674.6398933671. The cubic root of 215345056 is about 599.3929564076.

Adding to 215345056 its reverse (650543512), we get a palindrome (865888568).

The spelling of 215345056 in words is "two hundred fifteen million, three hundred forty-five thousand, fifty-six".