202161105 has 12 divisors (see below), whose sum is σ = 350412660. Its totient is φ = 107819232.

The previous prime is 202161073. The next prime is 202161107. The reversal of 202161105 is 501161202.

202161105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 130233744 + 71927361 = 11412^2 + 8481^2 .

It is not a de Polignac number, because 202161105 - 2⁵ = 202161073 is a prime.

It is a super-2 number, since 2×202161105² = 81738224749642050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202161107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2246190 + ... + 2246279.

It is an arithmetic number, because the mean of its divisors is an integer number (29201055).

Almost surely, 2^202161105 is an apocalyptic number.

It is an amenable number.

202161105 is a deficient number, since it is larger than the sum of its proper divisors (148251555).

202161105 is a wasteful number, since it uses less digits than its factorization.

202161105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492480 (or 4492477 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 202161105 is about 14218.3369280658. The cubic root of 202161105 is about 586.9023758355.

It can be divided in two parts, 20216 and 1105, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 202161105 in words is "two hundred two million, one hundred sixty-one thousand, one hundred five".