31234342221 has 6 divisors (see below), whose sum is σ = 45116272110. Its totient is φ = 20822894808.

The previous prime is 31234342219. The next prime is 31234342241. The reversal of 31234342221 is 12224343213.

31234342221 is a `hidden beast` number, since 3 + 1 + 2 + 3 + 434 + 2 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19995374025 + 11238968196 = 141405^2 + 106014^2 .

It is not a de Polignac number, because 31234342221 - 2¹ = 31234342219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234342241) 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, 1735241226 + ... + 1735241243.

It is an arithmetic number, because the mean of its divisors is an integer number (7519378685).

Almost surely, 2^31234342221 is an apocalyptic number.

It is an amenable number.

31234342221 is a deficient number, since it is larger than the sum of its proper divisors (13881929889).

31234342221 is a wasteful number, since it uses less digits than its factorization.

31234342221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470482475 (or 3470482472 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 31234342221 its reverse (12224343213), we get a palindrome (43458685434).

The spelling of 31234342221 in words is "thirty-one billion, two hundred thirty-four million, three hundred forty-two thousand, two hundred twenty-one".