31204230321 has 12 divisors (see below), whose sum is σ = 45731820176. Its totient is φ = 18911654520.

The previous prime is 31204230313. The next prime is 31204230329. The reversal of 31204230321 is 12303240213.

It is an interprime number because it is at equal distance from previous prime (31204230313) and next prime (31204230329).

It is not a de Polignac number, because 31204230321 - 2³ = 31204230313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31204230329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42980671 + ... + 42981396.

Almost surely, 2^31204230321 is an apocalyptic number.

It is an amenable number.

31204230321 is a deficient number, since it is larger than the sum of its proper divisors (14527589855).

31204230321 is a wasteful number, since it uses less digits than its factorization.

31204230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85962092 (or 85962081 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31204230321 its reverse (12303240213), we get a palindrome (43507470534).

The spelling of 31204230321 in words is "thirty-one billion, two hundred four million, two hundred thirty thousand, three hundred twenty-one".