216042045 has 32 divisors (see below), whose sum is σ = 353683584. Its totient is φ = 112569600.

The previous prime is 216042041. The next prime is 216042049. The reversal of 216042045 is 540240612.

It is an interprime number because it is at equal distance from previous prime (216042041) and next prime (216042049).

It is not a de Polignac number, because 216042045 - 2² = 216042041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216042041) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 262735 + ... + 263555.

It is an arithmetic number, because the mean of its divisors is an integer number (11052612).

Almost surely, 2^216042045 is an apocalyptic number.

It is an amenable number.

216042045 is a deficient number, since it is larger than the sum of its proper divisors (137641539).

216042045 is a wasteful number, since it uses less digits than its factorization.

216042045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 216042045 is about 14698.3687870457. The cubic root of 216042045 is about 600.0389280298.

Adding to 216042045 its reverse (540240612), we get a palindrome (756282657).

The spelling of 216042045 in words is "two hundred sixteen million, forty-two thousand, forty-five".