111152161 has 4 divisors (see below), whose sum is σ = 111175492. Its totient is φ = 111128832.

The previous prime is 111152159. The next prime is 111152179. The reversal of 111152161 is 161251111.

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 62710561 + 48441600 = 7919^2 + 6960^2 .

It is a cyclic number.

It is not a de Polignac number, because 111152161 - 2¹ = 111152159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111152101) 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, 1656 + ... + 15001.

It is an arithmetic number, because the mean of its divisors is an integer number (27793873).

Almost surely, 2^111152161 is an apocalyptic number.

It is an amenable number.

111152161 is a deficient number, since it is larger than the sum of its proper divisors (23331).

111152161 is an equidigital number, since it uses as much as digits as its factorization.

111152161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23330.

The product of its digits is 60, while the sum is 19.

The square root of 111152161 is about 10542.8725212819. The cubic root of 111152161 is about 480.8090536643.

The spelling of 111152161 in words is "one hundred eleven million, one hundred fifty-two thousand, one hundred sixty-one".