4212005155 has 4 divisors (see below), whose sum is σ = 5054406192. Its totient is φ = 3369604120.

The previous prime is 4212005093. The next prime is 4212005179. The reversal of 4212005155 is 5515002124.

4212005155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-4212005155 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, 421200511 + ... + 421200520.

It is an arithmetic number, because the mean of its divisors is an integer number (1263601548).

Almost surely, 2^4212005155 is an apocalyptic number.

4212005155 is a deficient number, since it is larger than the sum of its proper divisors (842401037).

4212005155 is an equidigital number, since it uses as much as digits as its factorization.

4212005155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842401036.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 4212005155 is about 64899.9626733329. The cubic root of 4212005155 is about 1614.9644424688.

Adding to 4212005155 its reverse (5515002124), we get a palindrome (9727007279).

The spelling of 4212005155 in words is "four billion, two hundred twelve million, five thousand, one hundred fifty-five".