231432434 has 4 divisors (see below), whose sum is σ = 347148654. Its totient is φ = 115716216.

The previous prime is 231432433. The next prime is 231432457. The reversal of 231432434 is 434234132.

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

It can be written as a sum of positive squares in only one way, i.e., 222099409 + 9333025 = 14903^2 + 3055^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231432431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57858107 + ... + 57858110.

Almost surely, 2^231432434 is an apocalyptic number.

231432434 is a deficient number, since it is larger than the sum of its proper divisors (115716220).

231432434 is a wasteful number, since it uses less digits than its factorization.

231432434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115716219.

The product of its digits is 6912, while the sum is 26.

The square root of 231432434 is about 15212.9035361433. The cubic root of 231432434 is about 613.9618805181.

Adding to 231432434 its reverse (434234132), we get a palindrome (665666566).

The spelling of 231432434 in words is "two hundred thirty-one million, four hundred thirty-two thousand, four hundred thirty-four".