231943481 has 16 divisors (see below), whose sum is σ = 293498880. Its totient is φ = 178033680.

The previous prime is 231943463. The next prime is 231943487. The reversal of 231943481 is 184349132.

It is a de Polignac number, because none of the positive numbers 2^k-231943481 is a prime.

It is a super-2 number, since 2×231943481² = 107595556756794722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231943487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17321 + ... + 27638.

It is an arithmetic number, because the mean of its divisors is an integer number (18343680).

Almost surely, 2^231943481 is an apocalyptic number.

It is an amenable number.

231943481 is a deficient number, since it is larger than the sum of its proper divisors (61555399).

231943481 is a wasteful number, since it uses less digits than its factorization.

231943481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45044.

The product of its digits is 20736, while the sum is 35.

The square root of 231943481 is about 15229.6907716473. The cubic root of 231943481 is about 614.4134633046.

The spelling of 231943481 in words is "two hundred thirty-one million, nine hundred forty-three thousand, four hundred eighty-one".