2042421155 has 4 divisors (see below), whose sum is σ = 2450905392. Its totient is φ = 1633936920.

The previous prime is 2042421119. The next prime is 2042421163. The reversal of 2042421155 is 5511242402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2042421155 - 2⁸ = 2042420899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204242111 + ... + 204242120.

It is an arithmetic number, because the mean of its divisors is an integer number (612726348).

Almost surely, 2^2042421155 is an apocalyptic number.

2042421155 is a deficient number, since it is larger than the sum of its proper divisors (408484237).

2042421155 is an equidigital number, since it uses as much as digits as its factorization.

2042421155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408484236.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 2042421155 is about 45193.1538509983. The cubic root of 2042421155 is about 1268.7666856016.

Adding to 2042421155 its reverse (5511242402), we get a palindrome (7553663557).

The spelling of 2042421155 in words is "two billion, forty-two million, four hundred twenty-one thousand, one hundred fifty-five".