231441331 has 4 divisors (see below), whose sum is σ = 252481464. Its totient is φ = 210401200.

The previous prime is 231441307. The next prime is 231441347. The reversal of 231441331 is 133144132.

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 231441331 - 2⁹ = 231440819 is a prime.

It is a super-2 number, since 2×231441331² = 107130179390103122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231441391) 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, 10520050 + ... + 10520071.

It is an arithmetic number, because the mean of its divisors is an integer number (63120366).

Almost surely, 2^231441331 is an apocalyptic number.

231441331 is a deficient number, since it is larger than the sum of its proper divisors (21040133).

231441331 is a wasteful number, since it uses less digits than its factorization.

231441331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21040132.

The product of its digits is 864, while the sum is 22.

The square root of 231441331 is about 15213.1959495696. The cubic root of 231441331 is about 613.9697479675.

Adding to 231441331 its reverse (133144132), we get a palindrome (364585463).

The spelling of 231441331 in words is "two hundred thirty-one million, four hundred forty-one thousand, three hundred thirty-one".