163231385 has 4 divisors (see below), whose sum is σ = 195877668. Its totient is φ = 130585104.

The previous prime is 163231381. The next prime is 163231403. The reversal of 163231385 is 583132361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40043584 + 123187801 = 6328^2 + 11099^2 .

It is a cyclic number.

It is not a de Polignac number, because 163231385 - 2² = 163231381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163231381) 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, 16323134 + ... + 16323143.

It is an arithmetic number, because the mean of its divisors is an integer number (48969417).

Almost surely, 2^163231385 is an apocalyptic number.

It is an amenable number.

163231385 is a deficient number, since it is larger than the sum of its proper divisors (32646283).

163231385 is an equidigital number, since it uses as much as digits as its factorization.

163231385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32646282.

The product of its digits is 12960, while the sum is 32.

The square root of 163231385 is about 12776.2038571713. The cubic root of 163231385 is about 546.5139121005.

The spelling of 163231385 in words is "one hundred sixty-three million, two hundred thirty-one thousand, three hundred eighty-five".