2208042421 has 16 divisors (see below), whose sum is σ = 2510079040. Its totient is φ = 1930841712.

The previous prime is 2208042409. The next prime is 2208042493. The reversal of 2208042421 is 1242408022.

It is not a de Polignac number, because 2208042421 - 2⁹ = 2208041909 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 (2208042521) 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, 76786 + ... + 101548.

It is an arithmetic number, because the mean of its divisors is an integer number (156879940).

Almost surely, 2^2208042421 is an apocalyptic number.

It is an amenable number.

2208042421 is a deficient number, since it is larger than the sum of its proper divisors (302036619).

2208042421 is an equidigital number, since it uses as much as digits as its factorization.

2208042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24833 (or 24795 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 2208042421 is about 46989.8118851310. The cubic root of 2208042421 is about 1302.1743535007.

The spelling of 2208042421 in words is "two billion, two hundred eight million, forty-two thousand, four hundred twenty-one".