216042069 has 16 divisors (see below), whose sum is σ = 314841600. Its totient is φ = 131182080.

The previous prime is 216042067. The next prime is 216042089. The reversal of 216042069 is 960240612.

It is not a de Polignac number, because 216042069 - 2¹ = 216042067 is a prime.

It is a super-2 number, since 2×216042069² = 93348351155601522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216042061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66744 + ... + 69905.

It is an arithmetic number, because the mean of its divisors is an integer number (19677600).

Almost surely, 2^216042069 is an apocalyptic number.

It is an amenable number.

216042069 is a deficient number, since it is larger than the sum of its proper divisors (98799531).

216042069 is a wasteful number, since it uses less digits than its factorization.

216042069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136700.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 216042069 is about 14698.3696034628. The cubic root of 216042069 is about 600.0389502492.

The spelling of 216042069 in words is "two hundred sixteen million, forty-two thousand, sixty-nine".