163346431 has 4 divisors (see below), whose sum is σ = 163611792. Its totient is φ = 163081072.

The previous prime is 163346423. The next prime is 163346459. The reversal of 163346431 is 134643361.

It is a happy number.

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 163346431 - 2³ = 163346423 is a prime.

It is a super-2 number, since 2×163346431² = 53364113040875522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163346393 and 163346402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163343431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131755 + ... + 132988.

It is an arithmetic number, because the mean of its divisors is an integer number (40902948).

Almost surely, 2^163346431 is an apocalyptic number.

163346431 is a deficient number, since it is larger than the sum of its proper divisors (265361).

163346431 is an equidigital number, since it uses as much as digits as its factorization.

163346431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265360.

The product of its digits is 15552, while the sum is 31.

The square root of 163346431 is about 12780.7054187161. The cubic root of 163346431 is about 546.6422768631.

Adding to 163346431 its reverse (134643361), we get a palindrome (297989792).

The spelling of 163346431 in words is "one hundred sixty-three million, three hundred forty-six thousand, four hundred thirty-one".