231434645 has 16 divisors (see below), whose sum is σ = 309400560. Its totient is φ = 165010944.

The previous prime is 231434629. The next prime is 231434657. The reversal of 231434645 is 546434132.

It can be written as a sum of positive squares in 8 ways, for example, as 73856836 + 157577809 = 8594^2 + 12553^2 .

It is a cyclic number.

It is not a de Polignac number, because 231434645 - 2⁴ = 231434629 is a prime.

It is a Curzon number.

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, 59504 + ... + 63273.

It is an arithmetic number, because the mean of its divisors is an integer number (19337535).

Almost surely, 2^231434645 is an apocalyptic number.

It is an amenable number.

231434645 is a deficient number, since it is larger than the sum of its proper divisors (77965915).

231434645 is a wasteful number, since it uses less digits than its factorization.

231434645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122824.

The product of its digits is 34560, while the sum is 32.

The square root of 231434645 is about 15212.9762045433. The cubic root of 231434645 is about 613.9638356826.

Adding to 231434645 its reverse (546434132), we get a palindrome (777868777).

The spelling of 231434645 in words is "two hundred thirty-one million, four hundred thirty-four thousand, six hundred forty-five".