31134333221 has 8 divisors (see below), whose sum is σ = 31896535104. Its totient is φ = 30372266080.

The previous prime is 31134333143. The next prime is 31134333227. The reversal of 31134333221 is 12233343113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31134333221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31134333227) 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, 560906 + ... + 613908.

It is an arithmetic number, because the mean of its divisors is an integer number (3987066888).

Almost surely, 2^31134333221 is an apocalyptic number.

It is an amenable number.

31134333221 is a deficient number, since it is larger than the sum of its proper divisors (762201883).

31134333221 is a wasteful number, since it uses less digits than its factorization.

31134333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67371.

The product of its digits is 3888, while the sum is 26.

Adding to 31134333221 its reverse (12233343113), we get a palindrome (43367676334).

It can be divided in two parts, 3113 and 4333221, that added together give a palindrome (4336334).

The spelling of 31134333221 in words is "thirty-one billion, one hundred thirty-four million, three hundred thirty-three thousand, two hundred twenty-one".