431279023265 has 4 divisors (see below), whose sum is σ = 517534827924. Its totient is φ = 345023218608.

The previous prime is 431279023237. The next prime is 431279023277. The reversal of 431279023265 is 562320972134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562320972134 = 2 ⋅281160486067.

It can be written as a sum of positive squares in 2 ways, for example, as 299376405409 + 131902617856 = 547153^2 + 363184^2 .

It is a cyclic number.

It is not a de Polignac number, because 431279023265 - 2¹⁰ = 431279022241 is a prime.

It is a super-3 number, since 3×431279023265³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43127902322 + ... + 43127902331.

It is an arithmetic number, because the mean of its divisors is an integer number (129383706981).

Almost surely, 2^431279023265 is an apocalyptic number.

It is an amenable number.

431279023265 is a deficient number, since it is larger than the sum of its proper divisors (86255804659).

431279023265 is an equidigital number, since it uses as much as digits as its factorization.

431279023265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86255804658.

The product of its (nonzero) digits is 544320, while the sum is 44.

Adding to 431279023265 its reverse (562320972134), we get a palindrome (993599995399).

The spelling of 431279023265 in words is "four hundred thirty-one billion, two hundred seventy-nine million, twenty-three thousand, two hundred sixty-five".