163285431 has 4 divisors (see below), whose sum is σ = 217713912. Its totient is φ = 108856952.

The previous prime is 163285427. The next prime is 163285433. The reversal of 163285431 is 134582361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163285431 - 2² = 163285427 is a prime.

It is a super-2 number, since 2×163285431² = 53324263953711522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163285392 and 163285401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163285433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27214236 + ... + 27214241.

It is an arithmetic number, because the mean of its divisors is an integer number (54428478).

Almost surely, 2^163285431 is an apocalyptic number.

163285431 is a deficient number, since it is larger than the sum of its proper divisors (54428481).

163285431 is an equidigital number, since it uses as much as digits as its factorization.

163285431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54428480.

The product of its digits is 17280, while the sum is 33.

The square root of 163285431 is about 12778.3187861315. The cubic root of 163285431 is about 546.5742224621.

The spelling of 163285431 in words is "one hundred sixty-three million, two hundred eighty-five thousand, four hundred thirty-one".