231543422 has 16 divisors (see below), whose sum is σ = 382024944. Its totient is φ = 105245800.

The previous prime is 231543421. The next prime is 231543427. The reversal of 231543422 is 224345132.

It is a super-2 number, since 2×231543422² = 107224712542940168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231543391 and 231543400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231543421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40829 + ... + 46152.

It is an arithmetic number, because the mean of its divisors is an integer number (23876559).

Almost surely, 2^231543422 is an apocalyptic number.

231543422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231543422 is a deficient number, since it is larger than the sum of its proper divisors (150481522).

231543422 is an equidigital number, since it uses as much as digits as its factorization.

231543422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87016 (or 86994 counting only the distinct ones).

The product of its digits is 5760, while the sum is 26.

The square root of 231543422 is about 15216.5509232546. The cubic root of 231543422 is about 614.0600106864.

Adding to 231543422 its reverse (224345132), we get a palindrome (455888554).

The spelling of 231543422 in words is "two hundred thirty-one million, five hundred forty-three thousand, four hundred twenty-two".