215040330 has 48 divisors (see below), whose sum is σ = 559845000. Its totient is φ = 57268224.

The previous prime is 215040289. The next prime is 215040349. The reversal of 215040330 is 33040512.

It can be written as a sum of positive squares in 4 ways, for example, as 196196049 + 18844281 = 14007^2 + 4341^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 111454 + ... + 113366.

Almost surely, 2^215040330 is an apocalyptic number.

215040330 is an abundant number, since it is smaller than the sum of its proper divisors (344804670).

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

215040330 is a wasteful number, since it uses less digits than its factorization.

215040330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3175 (or 3172 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 215040330 is about 14664.2534757143. The cubic root of 215040330 is about 599.1100974416.

Adding to 215040330 its reverse (33040512), we get a palindrome (248080842).

The spelling of 215040330 in words is "two hundred fifteen million, forty thousand, three hundred thirty".