431311321 has 8 divisors (see below), whose sum is σ = 494803584. Its totient is φ = 368288160.

The previous prime is 431311313. The next prime is 431311327. The reversal of 431311321 is 123113134.

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

It is a cyclic number.

It is not a de Polignac number, because 431311321 - 2³ = 431311313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431311327) 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, 115300 + ... + 118981.

It is an arithmetic number, because the mean of its divisors is an integer number (61850448).

Almost surely, 2^431311321 is an apocalyptic number.

It is an amenable number.

431311321 is a deficient number, since it is larger than the sum of its proper divisors (63492263).

431311321 is a wasteful number, since it uses less digits than its factorization.

431311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234551.

The product of its digits is 216, while the sum is 19.

The square root of 431311321 is about 20768.0360409934. The cubic root of 431311321 is about 755.5507120420.

Adding to 431311321 its reverse (123113134), we get a palindrome (554424455).

It can be divided in two parts, 4313113 and 21, that added together give a palindrome (4313134).

The spelling of 431311321 in words is "four hundred thirty-one million, three hundred eleven thousand, three hundred twenty-one".