2402231221 has 16 divisors (see below), whose sum is σ = 2641468480. Its totient is φ = 2171214720.

The previous prime is 2402231219. The next prime is 2402231243. The reversal of 2402231221 is 1221322042.

It is a cyclic number.

It is not a de Polignac number, because 2402231221 - 2¹ = 2402231219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2402231281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122806 + ... + 141016.

It is an arithmetic number, because the mean of its divisors is an integer number (165091780).

Almost surely, 2^2402231221 is an apocalyptic number.

It is an amenable number.

2402231221 is a deficient number, since it is larger than the sum of its proper divisors (239237259).

2402231221 is a wasteful number, since it uses less digits than its factorization.

2402231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2402231221 is about 49012.5618693820. The cubic root of 2402231221 is about 1339.2806752267.

Adding to 2402231221 its reverse (1221322042), we get a palindrome (3623553263).

The spelling of 2402231221 in words is "two billion, four hundred two million, two hundred thirty-one thousand, two hundred twenty-one".