216478143 has 16 divisors (see below), whose sum is σ = 366524160. Its totient is φ = 123701688.

The previous prime is 216478133. The next prime is 216478147. The reversal of 216478143 is 341874612.

216478143 is a `hidden beast` number, since 2 + 1 + 647 + 8 + 1 + 4 + 3 = 666.

It is not a de Polignac number, because 216478143 - 2⁶ = 216478079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216478098 and 216478107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216478147) 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, 572505 + ... + 572882.

It is an arithmetic number, because the mean of its divisors is an integer number (22907760).

Almost surely, 2^216478143 is an apocalyptic number.

216478143 is a deficient number, since it is larger than the sum of its proper divisors (150046017).

216478143 is a wasteful number, since it uses less digits than its factorization.

216478143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145403 (or 1145397 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 216478143 is about 14713.1962197206. The cubic root of 216478143 is about 600.4423987254.

The spelling of 216478143 in words is "two hundred sixteen million, four hundred seventy-eight thousand, one hundred forty-three".