231244145 has 8 divisors (see below), whose sum is σ = 302719680. Its totient is φ = 168177520.

The previous prime is 231244133. The next prime is 231244157. The reversal of 231244145 is 541442132.

It is an interprime number because it is at equal distance from previous prime (231244133) and next prime (231244157).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231244145 - 2⁴ = 231244129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2102165 + ... + 2102274.

It is an arithmetic number, because the mean of its divisors is an integer number (37839960).

Almost surely, 2^231244145 is an apocalyptic number.

It is an amenable number.

231244145 is a deficient number, since it is larger than the sum of its proper divisors (71475535).

231244145 is a wasteful number, since it uses less digits than its factorization.

231244145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204455.

The product of its digits is 3840, while the sum is 26.

The square root of 231244145 is about 15206.7138133129. The cubic root of 231244145 is about 613.7953327972.

Adding to 231244145 its reverse (541442132), we get a palindrome (772686277).

The spelling of 231244145 in words is "two hundred thirty-one million, two hundred forty-four thousand, one hundred forty-five".