31231140321 has 8 divisors (see below), whose sum is σ = 42109403040. Its totient is φ = 20586818912.

The previous prime is 31231140319. The next prime is 31231140331. The reversal of 31231140321 is 12304113213.

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 31231140321 - 2¹ = 31231140319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31231140331) 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, 58485015 + ... + 58485548.

It is an arithmetic number, because the mean of its divisors is an integer number (5263675380).

Almost surely, 2^31231140321 is an apocalyptic number.

It is an amenable number.

31231140321 is a deficient number, since it is larger than the sum of its proper divisors (10878262719).

31231140321 is a wasteful number, since it uses less digits than its factorization.

31231140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116970655.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31231140321 its reverse (12304113213), we get a palindrome (43535253534).

The spelling of 31231140321 in words is "thirty-one billion, two hundred thirty-one million, one hundred forty thousand, three hundred twenty-one".