216478043 has 4 divisors (see below), whose sum is σ = 216507648. Its totient is φ = 216448440.

The previous prime is 216478007. The next prime is 216478057. The reversal of 216478043 is 340874612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 216478043 - 2²⁴ = 199700827 is a prime.

It is a super-2 number, since 2×216478043² = 93725486202219698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216477994 and 216478012.

It is not an unprimeable number, because it can be changed into a prime (216478543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4973 + ... + 21393.

It is an arithmetic number, because the mean of its divisors is an integer number (54126912).

Almost surely, 2^216478043 is an apocalyptic number.

216478043 is a deficient number, since it is larger than the sum of its proper divisors (29605).

216478043 is a wasteful number, since it uses less digits than its factorization.

216478043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29604.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 216478043 is about 14713.1928214103. The cubic root of 216478043 is about 600.4423062692.

The spelling of 216478043 in words is "two hundred sixteen million, four hundred seventy-eight thousand, forty-three".