2198542421 has 4 divisors (see below), whose sum is σ = 2314255200. Its totient is φ = 2082829644.

The previous prime is 2198542417. The next prime is 2198542433. The reversal of 2198542421 is 1242458912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2198542421 - 2² = 2198542417 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 (2198542441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57856361 + ... + 57856398.

It is an arithmetic number, because the mean of its divisors is an integer number (578563800).

Almost surely, 2^2198542421 is an apocalyptic number.

It is an amenable number.

2198542421 is a deficient number, since it is larger than the sum of its proper divisors (115712779).

2198542421 is a wasteful number, since it uses less digits than its factorization.

2198542421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115712778.

The product of its digits is 46080, while the sum is 38.

The square root of 2198542421 is about 46888.6171794392. The cubic root of 2198542421 is about 1300.3041538825.

The spelling of 2198542421 in words is "two billion, one hundred ninety-eight million, five hundred forty-two thousand, four hundred twenty-one".