216162047 has 4 divisors (see below), whose sum is σ = 216467640. Its totient is φ = 215856456.

The previous prime is 216162041. The next prime is 216162049. The reversal of 216162047 is 740261612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216162047 - 2¹² = 216157951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216162041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151733 + ... + 153150.

It is an arithmetic number, because the mean of its divisors is an integer number (54116910).

Almost surely, 2^216162047 is an apocalyptic number.

216162047 is a deficient number, since it is larger than the sum of its proper divisors (305593).

216162047 is an equidigital number, since it uses as much as digits as its factorization.

216162047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305592.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 216162047 is about 14702.4503740023. The cubic root of 216162047 is about 600.1500060124.

The spelling of 216162047 in words is "two hundred sixteen million, one hundred sixty-two thousand, forty-seven".