215816054 has 16 divisors (see below), whose sum is σ = 350740368. Its totient is φ = 99197952.

The previous prime is 215816047. The next prime is 215816059. The reversal of 215816054 is 450618512.

It is a self number, because there is not a number n which added to its sum of digits gives 215816054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215816059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72347 + ... + 75270.

It is an arithmetic number, because the mean of its divisors is an integer number (21921273).

Almost surely, 2^215816054 is an apocalyptic number.

215816054 is a deficient number, since it is larger than the sum of its proper divisors (134924314).

215816054 is a wasteful number, since it uses less digits than its factorization.

215816054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147679.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 215816054 is about 14690.6791538036. The cubic root of 215816054 is about 599.8296312584.

The spelling of 215816054 in words is "two hundred fifteen million, eight hundred sixteen thousand, fifty-four".