216455143 has 16 divisors (see below), whose sum is σ = 226321920. Its totient is φ = 206841600.

The previous prime is 216455137. The next prime is 216455153. The reversal of 216455143 is 341554612.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216455143 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 (216455153) 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 15 ways as a sum of consecutive naturals, for example, 770163 + ... + 770443.

It is an arithmetic number, because the mean of its divisors is an integer number (14145120).

Almost surely, 2^216455143 is an apocalyptic number.

216455143 is a deficient number, since it is larger than the sum of its proper divisors (9866777).

216455143 is a wasteful number, since it uses less digits than its factorization.

216455143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its digits is 14400, while the sum is 31.

The square root of 216455143 is about 14712.4145876875. The cubic root of 216455143 is about 600.4211330461.

The spelling of 216455143 in words is "two hundred sixteen million, four hundred fifty-five thousand, one hundred forty-three".