2331252221 has 8 divisors (see below), whose sum is σ = 2341468344. Its totient is φ = 2321049600.

The previous prime is 2331252163. The next prime is 2331252233. The reversal of 2331252221 is 1222521332.

It can be written as a sum of positive squares in 4 ways, for example, as 198105625 + 2133146596 = 14075^2 + 46186^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2331252221 - 2²² = 2327057917 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 (2331252241) 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, 496541 + ... + 501213.

It is an arithmetic number, because the mean of its divisors is an integer number (292683543).

Almost surely, 2^2331252221 is an apocalyptic number.

It is an amenable number.

2331252221 is a deficient number, since it is larger than the sum of its proper divisors (10216123).

2331252221 is a wasteful number, since it uses less digits than its factorization.

2331252221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6751.

The product of its digits is 1440, while the sum is 23.

The square root of 2331252221 is about 48283.0427893686. The cubic root of 2331252221 is about 1325.9579584337.

Adding to 2331252221 its reverse (1222521332), we get a palindrome (3553773553).

The spelling of 2331252221 in words is "two billion, three hundred thirty-one million, two hundred fifty-two thousand, two hundred twenty-one".