231194881 has 4 divisors (see below), whose sum is σ = 231249712. Its totient is φ = 231140052.

The previous prime is 231194867. The next prime is 231194921. The reversal of 231194881 is 188491132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231194881 - 2¹¹ = 231192833 is a prime.

It is a super-2 number, since 2×231194881² = 106902146001208322, which contains 22 as substring.

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 231194881.

It is not an unprimeable number, because it can be changed into a prime (231194861) 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, 20511 + ... + 29716.

It is an arithmetic number, because the mean of its divisors is an integer number (57812428).

Almost surely, 2^231194881 is an apocalyptic number.

It is an amenable number.

231194881 is a deficient number, since it is larger than the sum of its proper divisors (54831).

231194881 is an equidigital number, since it uses as much as digits as its factorization.

231194881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54830.

The product of its digits is 13824, while the sum is 37.

The square root of 231194881 is about 15205.0939161848. The cubic root of 231194881 is about 613.7517422725.

It can be divided in two parts, 231 and 194881, that added together give a cube (195112 = 58³).

The spelling of 231194881 in words is "two hundred thirty-one million, one hundred ninety-four thousand, eight hundred eighty-one".