2031302221 has 8 divisors (see below), whose sum is σ = 2228831640. Its totient is φ = 1839669312.

The previous prime is 2031302219. The next prime is 2031302233. The reversal of 2031302221 is 1222031302.

It can be written as a sum of positive squares in 4 ways, for example, as 840362121 + 1190940100 = 28989^2 + 34510^2 .

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

It is not a de Polignac number, because 2031302221 - 2¹ = 2031302219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2031302195 and 2031302204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031302281) 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, 1473406 + ... + 1474783.

It is an arithmetic number, because the mean of its divisors is an integer number (278603955).

Almost surely, 2^2031302221 is an apocalyptic number.

It is an amenable number.

2031302221 is a deficient number, since it is larger than the sum of its proper divisors (197529419).

2031302221 is a wasteful number, since it uses less digits than its factorization.

2031302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948255.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2031302221 is about 45069.9702795553. The cubic root of 2031302221 is about 1266.4601076458.

Adding to 2031302221 its reverse (1222031302), we get a palindrome (3253333523).

The spelling of 2031302221 in words is "two billion, thirty-one million, three hundred two thousand, two hundred twenty-one".