231144534 has 12 divisors (see below), whose sum is σ = 500813196. Its totient is φ = 77048172.

The previous prime is 231144527. The next prime is 231144539. The reversal of 231144534 is 435441132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231144498 and 231144507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231144539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6420664 + ... + 6420699.

It is an arithmetic number, because the mean of its divisors is an integer number (41734433).

Almost surely, 2^231144534 is an apocalyptic number.

231144534 is an abundant number, since it is smaller than the sum of its proper divisors (269668662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231144534 is a wasteful number, since it uses less digits than its factorization.

231144534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12841371 (or 12841368 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 231144534 is about 15203.4382295585. The cubic root of 231144534 is about 613.7071870728.

Adding to 231144534 its reverse (435441132), we get a palindrome (666585666).

The spelling of 231144534 in words is "two hundred thirty-one million, one hundred forty-four thousand, five hundred thirty-four".