231042445 has 8 divisors (see below), whose sum is σ = 281049336. Its totient is φ = 182301696.

The previous prime is 231042433. The next prime is 231042463. The reversal of 231042445 is 544240132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 230948809 = 306^2 + 15197^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231042445 is a prime.

It is a super-2 number, since 2×231042445² = 106761222783156050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 316132 + ... + 316861.

It is an arithmetic number, because the mean of its divisors is an integer number (35131167).

Almost surely, 2^231042445 is an apocalyptic number.

It is an amenable number.

231042445 is a deficient number, since it is larger than the sum of its proper divisors (50006891).

231042445 is an equidigital number, since it uses as much as digits as its factorization.

231042445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633071.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 231042445 is about 15200.0804274188. The cubic root of 231042445 is about 613.6168222866.

Adding to 231042445 its reverse (544240132), we get a palindrome (775282577).

The spelling of 231042445 in words is "two hundred thirty-one million, forty-two thousand, four hundred forty-five".