431552321 has 8 divisors (see below), whose sum is σ = 437160360. Its totient is φ = 425968128.

The previous prime is 431552287. The next prime is 431552323. The reversal of 431552321 is 123255134.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6574096 + 424978225 = 2564^2 + 20615^2 .

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

It is not a de Polignac number, because 431552321 - 2¹⁰ = 431551297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431552323) 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, 32015 + ... + 43451.

It is an arithmetic number, because the mean of its divisors is an integer number (54645045).

Almost surely, 2^431552321 is an apocalyptic number.

It is an amenable number.

431552321 is a deficient number, since it is larger than the sum of its proper divisors (5608039).

431552321 is a wasteful number, since it uses less digits than its factorization.

431552321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11923.

The product of its digits is 3600, while the sum is 26.

The square root of 431552321 is about 20773.8374163273. The cubic root of 431552321 is about 755.6914099623.

The spelling of 431552321 in words is "four hundred thirty-one million, five hundred fifty-two thousand, three hundred twenty-one".