4212155161 has 4 divisors (see below), whose sum is σ = 4459929012. Its totient is φ = 3964381312.

The previous prime is 4212155113. The next prime is 4212155197. The reversal of 4212155161 is 1615512124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3299813136 + 912342025 = 57444^2 + 30205^2 .

It is a cyclic number.

It is not a de Polignac number, because 4212155161 - 2⁹ = 4212154649 is a prime.

It is a super-3 number, since 3×4212155161³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4212155111) 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, 123886900 + ... + 123886933.

It is an arithmetic number, because the mean of its divisors is an integer number (1114982253).

Almost surely, 2^4212155161 is an apocalyptic number.

It is an amenable number.

4212155161 is a deficient number, since it is larger than the sum of its proper divisors (247773851).

4212155161 is a wasteful number, since it uses less digits than its factorization.

4212155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247773850.

The product of its digits is 2400, while the sum is 28.

The square root of 4212155161 is about 64901.1183339702. The cubic root of 4212155161 is about 1614.9836139775.

Adding to 4212155161 its reverse (1615512124), we get a palindrome (5827667285).

The spelling of 4212155161 in words is "four billion, two hundred twelve million, one hundred fifty-five thousand, one hundred sixty-one".