31434444030221 has 4 divisors (see below), whose sum is σ = 31434457871100. Its totient is φ = 31434430189344.

The previous prime is 31434444030191. The next prime is 31434444030239. The reversal of 31434444030221 is 12203044443413.

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 224188045225 + 31210255984996 = 473485^2 + 5586614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31434444030221 is a prime.

It is a super-2 number, since 2×31434444030221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434444030281) 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, 2625056 + ... + 8352233.

It is an arithmetic number, because the mean of its divisors is an integer number (7858614467775).

Almost surely, 2^{31434444030221} is an apocalyptic number.

It is an amenable number.

31434444030221 is a deficient number, since it is larger than the sum of its proper divisors (13840879).

31434444030221 is a wasteful number, since it uses less digits than its factorization.

31434444030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13840878.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 31434444030221 its reverse (12203044443413), we get a palindrome (43637488473634).

The spelling of 31434444030221 in words is "thirty-one trillion, four hundred thirty-four billion, four hundred forty-four million, thirty thousand, two hundred twenty-one".