431434217 has 4 divisors (see below), whose sum is σ = 433286100. Its totient is φ = 429582336.

The previous prime is 431434183. The next prime is 431434229. The reversal of 431434217 is 712434134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712434134 = 2 ⋅356217067.

It can be written as a sum of positive squares in 2 ways, for example, as 78783376 + 352650841 = 8876^2 + 18779^2 .

It is a cyclic number.

It is not a de Polignac number, because 431434217 - 2⁶ = 431434153 is a prime.

It is a super-2 number, since 2×431434217² = 372270967196806178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431434217.

It is not an unprimeable number, because it can be changed into a prime (431434277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925592 + ... + 926057.

It is an arithmetic number, because the mean of its divisors is an integer number (108321525).

Almost surely, 2^431434217 is an apocalyptic number.

It is an amenable number.

431434217 is a deficient number, since it is larger than the sum of its proper divisors (1851883).

431434217 is a wasteful number, since it uses less digits than its factorization.

431434217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851882.

The product of its digits is 8064, while the sum is 29.

The square root of 431434217 is about 20770.9946078660. The cubic root of 431434217 is about 755.6224663550.

The spelling of 431434217 in words is "four hundred thirty-one million, four hundred thirty-four thousand, two hundred seventeen".