1231823163 has 4 divisors (see below), whose sum is σ = 1642430888. Its totient is φ = 821215440.

The previous prime is 1231823123. The next prime is 1231823209. The reversal of 1231823163 is 3613281321.

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

It is not a de Polignac number, because 1231823163 - 2⁹ = 1231822651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231823163.

It is not an unprimeable number, because it can be changed into a prime (1231823123) 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, 205303858 + ... + 205303863.

It is an arithmetic number, because the mean of its divisors is an integer number (410607722).

Almost surely, 2^1231823163 is an apocalyptic number.

1231823163 is a deficient number, since it is larger than the sum of its proper divisors (410607725).

1231823163 is an equidigital number, since it uses as much as digits as its factorization.

1231823163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410607724.

The product of its digits is 5184, while the sum is 30.

The square root of 1231823163 is about 35097.3384033604. The cubic root of 1231823163 is about 1071.9703883161.

The spelling of 1231823163 in words is "one billion, two hundred thirty-one million, eight hundred twenty-three thousand, one hundred sixty-three".