431214675721 has 4 divisors (see below), whose sum is σ = 439350801732. Its totient is φ = 423078549712.

The previous prime is 431214675707. The next prime is 431214675809. The reversal of 431214675721 is 127576412134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127576412134 = 2 ⋅63788206067.

It can be written as a sum of positive squares in 2 ways, for example, as 275426585721 + 155788090000 = 524811^2 + 394700^2 .

It is a cyclic number.

It is not a de Polignac number, because 431214675721 - 2¹⁵ = 431214642953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431214675121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4068062926 + ... + 4068063031.

It is an arithmetic number, because the mean of its divisors is an integer number (109837700433).

Almost surely, 2^431214675721 is an apocalyptic number.

It is an amenable number.

431214675721 is a deficient number, since it is larger than the sum of its proper divisors (8136126011).

431214675721 is an equidigital number, since it uses as much as digits as its factorization.

431214675721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8136126010.

The product of its digits is 282240, while the sum is 43.

The spelling of 431214675721 in words is "four hundred thirty-one billion, two hundred fourteen million, six hundred seventy-five thousand, seven hundred twenty-one".