163231234 has 4 divisors (see below), whose sum is σ = 244846854. Its totient is φ = 81615616.

The previous prime is 163231231. The next prime is 163231247. The reversal of 163231234 is 432132361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432132361 = 37 ⋅11679253.

It can be written as a sum of positive squares in only one way, i.e., 95942025 + 67289209 = 9795^2 + 8203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163231199 and 163231208.

It is not an unprimeable number, because it can be changed into a prime (163231231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40807807 + ... + 40807810.

Almost surely, 2^163231234 is an apocalyptic number.

163231234 is a deficient number, since it is larger than the sum of its proper divisors (81615620).

163231234 is an equidigital number, since it uses as much as digits as its factorization.

163231234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81615619.

The product of its digits is 2592, while the sum is 25.

The square root of 163231234 is about 12776.1979477464. The cubic root of 163231234 is about 546.5137435797.

Adding to 163231234 its reverse (432132361), we get a palindrome (595363595).

The spelling of 163231234 in words is "one hundred sixty-three million, two hundred thirty-one thousand, two hundred thirty-four".