109213161 has 4 divisors (see below), whose sum is σ = 145617552. Its totient is φ = 72808772.

The previous prime is 109213141. The next prime is 109213171. The reversal of 109213161 is 161312901.

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 109213161 - 2⁵ = 109213129 is a prime.

It is a super-2 number, since 2×109213161² = 23855029071223842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109213141) 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, 18202191 + ... + 18202196.

It is an arithmetic number, because the mean of its divisors is an integer number (36404388).

Almost surely, 2^109213161 is an apocalyptic number.

It is an amenable number.

109213161 is a deficient number, since it is larger than the sum of its proper divisors (36404391).

109213161 is an equidigital number, since it uses as much as digits as its factorization.

109213161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36404390.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 109213161 is about 10450.5100832447. The cubic root of 109213161 is about 477.9968035477.

The spelling of 109213161 in words is "one hundred nine million, two hundred thirteen thousand, one hundred sixty-one".