2205434021 has 32 divisors (see below), whose sum is σ = 2799982080. Its totient is φ = 1693440000.

The previous prime is 2205433957. The next prime is 2205434027. The reversal of 2205434021 is 1204345022.

It is a happy number.

It is not a de Polignac number, because 2205434021 - 2⁶ = 2205433957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205434027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240521 + ... + 249521.

It is an arithmetic number, because the mean of its divisors is an integer number (87499440).

Almost surely, 2^2205434021 is an apocalyptic number.

It is an amenable number.

2205434021 is a deficient number, since it is larger than the sum of its proper divisors (594548059).

2205434021 is a wasteful number, since it uses less digits than its factorization.

2205434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2205434021 is about 46962.0487308635. The cubic root of 2205434021 is about 1301.6613908399.

Adding to 2205434021 its reverse (1204345022), we get a palindrome (3409779043).

The spelling of 2205434021 in words is "two billion, two hundred five million, four hundred thirty-four thousand, twenty-one".