215316042 has 16 divisors (see below), whose sum is σ = 434896992. Its totient is φ = 71061200.

The previous prime is 215316029. The next prime is 215316047. The reversal of 215316042 is 240613512.

It is not an unprimeable number, because it can be changed into a prime (215316047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177048 + ... + 178259.

It is an arithmetic number, because the mean of its divisors is an integer number (27181062).

Almost surely, 2^215316042 is an apocalyptic number.

215316042 is an abundant number, since it is smaller than the sum of its proper divisors (219580950).

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

215316042 is a wasteful number, since it uses less digits than its factorization.

215316042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355413.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 215316042 is about 14673.6512838489. The cubic root of 215316042 is about 599.3660359408.

Adding to 215316042 its reverse (240613512), we get a palindrome (455929554).

The spelling of 215316042 in words is "two hundred fifteen million, three hundred sixteen thousand, forty-two".