231434217 has 24 divisors (see below), whose sum is σ = 391372800. Its totient is φ = 129021120.

The previous prime is 231434179. The next prime is 231434233. The reversal of 231434217 is 712434132.

It is a happy number.

231434217 is a `hidden beast` number, since 2 + 314 + 342 + 1 + 7 = 666.

It is not a de Polignac number, because 231434217 - 2⁷ = 231434089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231434267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42217 + ... + 47382.

It is an arithmetic number, because the mean of its divisors is an integer number (16307200).

Almost surely, 2^231434217 is an apocalyptic number.

It is an amenable number.

231434217 is a deficient number, since it is larger than the sum of its proper divisors (159938583).

231434217 is a wasteful number, since it uses less digits than its factorization.

231434217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89653 (or 89650 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 231434217 is about 15212.9621375983. The cubic root of 231434217 is about 613.9634572076.

Adding to 231434217 its reverse (712434132), we get a palindrome (943868349).

The spelling of 231434217 in words is "two hundred thirty-one million, four hundred thirty-four thousand, two hundred seventeen".