163431243 has 16 divisors (see below), whose sum is σ = 242774400. Its totient is φ = 108659880.

The previous prime is 163431241. The next prime is 163431259. The reversal of 163431243 is 342134361.

163431243 is a `hidden beast` number, since 1 + 634 + 3 + 1 + 24 + 3 = 666.

It is not a de Polignac number, because 163431243 - 2¹ = 163431241 is a prime.

It is a super-3 number, since 3×163431243³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (163431241) 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, 2248 + ... + 18218.

It is an arithmetic number, because the mean of its divisors is an integer number (15173400).

Almost surely, 2^163431243 is an apocalyptic number.

163431243 is a deficient number, since it is larger than the sum of its proper divisors (79343157).

163431243 is a wasteful number, since it uses less digits than its factorization.

163431243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16359 (or 16353 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 163431243 is about 12784.0229583649. The cubic root of 163431243 is about 546.7368688761.

The spelling of 163431243 in words is "one hundred sixty-three million, four hundred thirty-one thousand, two hundred forty-three".