231542445 has 16 divisors (see below), whose sum is σ = 378351360. Its totient is φ = 120861504.

The previous prime is 231542413. The next prime is 231542459. The reversal of 231542445 is 544245132.

It is not a de Polignac number, because 231542445 - 2⁵ = 231542413 is a prime.

It is a super-2 number, since 2×231542445² = 107223807673156050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163510 + ... + 164919.

It is an arithmetic number, because the mean of its divisors is an integer number (23646960).

Almost surely, 2^231542445 is an apocalyptic number.

It is an amenable number.

231542445 is a deficient number, since it is larger than the sum of its proper divisors (146808915).

231542445 is a wasteful number, since it uses less digits than its factorization.

231542445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328484.

The product of its digits is 19200, while the sum is 30.

The square root of 231542445 is about 15216.5188200192. The cubic root of 231542445 is about 614.0591470076.

Adding to 231542445 its reverse (544245132), we get a palindrome (775787577).

The spelling of 231542445 in words is "two hundred thirty-one million, five hundred forty-two thousand, four hundred forty-five".