31314432321 has 6 divisors (see below), whose sum is σ = 45231957810. Its totient is φ = 20876288208.

The previous prime is 31314432313. The next prime is 31314432379. The reversal of 31314432321 is 12323441313.

It is a happy number.

31314432321 is a `hidden beast` number, since 3 + 1 + 314 + 4 + 323 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27582566400 + 3731865921 = 166080^2 + 61089^2 .

It is not a de Polignac number, because 31314432321 - 2³ = 31314432313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31314432421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739690676 + ... + 1739690693.

It is an arithmetic number, because the mean of its divisors is an integer number (7538659635).

Almost surely, 2^31314432321 is an apocalyptic number.

It is an amenable number.

31314432321 is a deficient number, since it is larger than the sum of its proper divisors (13917525489).

31314432321 is a wasteful number, since it uses less digits than its factorization.

31314432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479381375 (or 3479381372 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 31314432321 its reverse (12323441313), we get a palindrome (43637873634).

The spelling of 31314432321 in words is "thirty-one billion, three hundred fourteen million, four hundred thirty-two thousand, three hundred twenty-one".