111632161 has 2 divisors, whose sum is σ = 111632162. Its totient is φ = 111632160.

The previous prime is 111632153. The next prime is 111632167. The reversal of 111632161 is 161236111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58064400 + 53567761 = 7620^2 + 7319^2 .

It is a cyclic number.

It is not a de Polignac number, because 111632161 - 2³ = 111632153 is a prime.

It is not a weakly prime, because it can be changed into another prime (111632167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55816080 + 55816081.

It is an arithmetic number, because the mean of its divisors is an integer number (55816081).

Almost surely, 2^111632161 is an apocalyptic number.

It is an amenable number.

111632161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111632161 is an equidigital number, since it uses as much as digits as its factorization.

111632161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 111632161 is about 10565.6121923909. The cubic root of 111632161 is about 481.5001691164.

Adding to 111632161 its reverse (161236111), we get a palindrome (272868272).

The spelling of 111632161 in words is "one hundred eleven million, six hundred thirty-two thousand, one hundred sixty-one".