111161471 has 2 divisors, whose sum is σ = 111161472. Its totient is φ = 111161470.

The previous prime is 111161467. The next prime is 111161473. The reversal of 111161471 is 174161111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111161471 - 2² = 111161467 is a prime.

It is a super-3 number, since 3×111161471³ (a number of 25 digits) contains 333 as substring.

Together with 111161473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111161473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55580735 + 55580736.

It is an arithmetic number, because the mean of its divisors is an integer number (55580736).

Almost surely, 2^111161471 is an apocalyptic number.

111161471 is a deficient number, since it is larger than the sum of its proper divisors (1).

111161471 is an equidigital number, since it uses as much as digits as its factorization.

111161471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 23.

The square root of 111161471 is about 10543.3140425580. The cubic root of 111161471 is about 480.8224773269.

The spelling of 111161471 in words is "one hundred eleven million, one hundred sixty-one thousand, four hundred seventy-one".