231143044225 has 48 divisors (see below), whose sum is σ = 306769115520. Its totient is φ = 172337932800.

The previous prime is 231143044207. The next prime is 231143044243. The reversal of 231143044225 is 522440341132.

It is an interprime number because it is at equal distance from previous prime (231143044207) and next prime (231143044243).

It is not a de Polignac number, because 231143044225 - 2⁵ = 231143044193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19537762 + ... + 19549588.

It is an arithmetic number, because the mean of its divisors is an integer number (6391023240).

Almost surely, 2^231143044225 is an apocalyptic number.

231143044225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231143044225 is a deficient number, since it is larger than the sum of its proper divisors (75626071295).

231143044225 is a wasteful number, since it uses less digits than its factorization.

231143044225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12730 (or 12725 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 231143044225 its reverse (522440341132), we get a palindrome (753583385357).

The spelling of 231143044225 in words is "two hundred thirty-one billion, one hundred forty-three million, forty-four thousand, two hundred twenty-five".