216393147 has 36 divisors (see below), whose sum is σ = 340629240. Its totient is φ = 135752112.

The previous prime is 216393139. The next prime is 216393173. The reversal of 216393147 is 741393612.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

216393147 is a `hidden beast` number, since 2 + 1 + 639 + 3 + 14 + 7 = 666.

It is not a de Polignac number, because 216393147 - 2³ = 216393139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216393127) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1452229 + ... + 1452377.

Almost surely, 2^216393147 is an apocalyptic number.

216393147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

216393147 is a deficient number, since it is larger than the sum of its proper divisors (124236093).

216393147 is an equidigital number, since it uses as much as digits as its factorization.

216393147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 171 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 216393147 is about 14710.3075086825. The cubic root of 216393147 is about 600.3638043661.

The spelling of 216393147 in words is "two hundred sixteen million, three hundred ninety-three thousand, one hundred forty-seven".