431537220673 has 8 divisors (see below), whose sum is σ = 465343088616. Its totient is φ = 397818595200.

The previous prime is 431537220623. The next prime is 431537220689. The reversal of 431537220673 is 376022735134.

It can be written as a sum of positive squares in 4 ways, for example, as 104023665729 + 327513554944 = 322527^2 + 572288^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 431537220673 - 2²⁹ = 431000349761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431537220623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21800338 + ... + 21820123.

It is an arithmetic number, because the mean of its divisors is an integer number (58167886077).

Almost surely, 2^431537220673 is an apocalyptic number.

It is an amenable number.

431537220673 is a deficient number, since it is larger than the sum of its proper divisors (33805867943).

431537220673 is a wasteful number, since it uses less digits than its factorization.

431537220673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43621235.

The product of its (nonzero) digits is 635040, while the sum is 43.

The spelling of 431537220673 in words is "four hundred thirty-one billion, five hundred thirty-seven million, two hundred twenty thousand, six hundred seventy-three".