163432431 has 8 divisors (see below), whose sum is σ = 242122160. Its totient is φ = 108954936.

The previous prime is 163432427. The next prime is 163432499. The reversal of 163432431 is 134234361.

163432431 is a `hidden beast` number, since 1 + 634 + 3 + 24 + 3 + 1 = 666.

It is not a de Polignac number, because 163432431 - 2² = 163432427 is a prime.

It is a super-2 number, since 2×163432431² = 53420319005139522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6053053 = 163432431 / (1 + 6 + 3 + 4 + 3 + 2 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163432395 and 163432404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163432421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3026500 + ... + 3026553.

It is an arithmetic number, because the mean of its divisors is an integer number (30265270).

Almost surely, 2^163432431 is an apocalyptic number.

163432431 is a deficient number, since it is larger than the sum of its proper divisors (78689729).

163432431 is an equidigital number, since it uses as much as digits as its factorization.

163432431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6053062 (or 6053056 counting only the distinct ones).

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

The square root of 163432431 is about 12784.0694225274. The cubic root of 163432431 is about 546.7381936368.

Adding to 163432431 its reverse (134234361), we get a palindrome (297666792).

The spelling of 163432431 in words is "one hundred sixty-three million, four hundred thirty-two thousand, four hundred thirty-one".