231132445 has 4 divisors (see below), whose sum is σ = 277358940. Its totient is φ = 184905952.

The previous prime is 231132443. The next prime is 231132449. The reversal of 231132445 is 544231132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60124516 + 171007929 = 7754^2 + 13077^2 .

It is a cyclic number.

It is not a de Polignac number, because 231132445 - 2¹ = 231132443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231132443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23113240 + ... + 23113249.

It is an arithmetic number, because the mean of its divisors is an integer number (69339735).

Almost surely, 2^231132445 is an apocalyptic number.

It is an amenable number.

231132445 is a deficient number, since it is larger than the sum of its proper divisors (46226495).

231132445 is an equidigital number, since it uses as much as digits as its factorization.

231132445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46226494.

The product of its digits is 2880, while the sum is 25.

The square root of 231132445 is about 15203.0406498174. The cubic root of 231132445 is about 613.6964877997.

Adding to 231132445 its reverse (544231132), we get a palindrome (775363577).

The spelling of 231132445 in words is "two hundred thirty-one million, one hundred thirty-two thousand, four hundred forty-five".