31133414321 has 4 divisors (see below), whose sum is σ = 32964791652. Its totient is φ = 29302036992.

The previous prime is 31133414309. The next prime is 31133414339. The reversal of 31133414321 is 12341433113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9611057296 + 21522357025 = 98036^2 + 146705^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133414321 - 2¹⁴ = 31133397937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31133414371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915688640 + ... + 915688673.

It is an arithmetic number, because the mean of its divisors is an integer number (8241197913).

Almost surely, 2^31133414321 is an apocalyptic number.

It is an amenable number.

31133414321 is a deficient number, since it is larger than the sum of its proper divisors (1831377331).

31133414321 is a wasteful number, since it uses less digits than its factorization.

31133414321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831377330.

The product of its digits is 2592, while the sum is 26.

Adding to 31133414321 its reverse (12341433113), we get a palindrome (43474847434).

The spelling of 31133414321 in words is "thirty-one billion, one hundred thirty-three million, four hundred fourteen thousand, three hundred twenty-one".