113162561 has 2 divisors, whose sum is σ = 113162562.
Its totient is φ = 113162560.
The previous prime is 113162551. The next prime is 113162563. The reversal of 113162561 is 165261311.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 113018161 + 144400 = 10631^2 + 380^2
It is an emirp because it is prime and its reverse (165261311) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-113162561 is a prime.
Together with 113162563, it forms a pair of twin primes.
It is a Chen prime.
It is a self number, because there is not a number n which added to its sum of digits gives 113162561.
It is not a weakly prime, because it can be changed into another prime (113162563) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56581280 + 56581281.
It is an arithmetic number, because the mean of its divisors is an integer number (56581281).
Almost surely, 2113162561 is an apocalyptic number.
It is an amenable number.
113162561 is a deficient number, since it is larger than the sum of its proper divisors (1).
113162561 is an equidigital number, since it uses as much as digits as its factorization.
113162561 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1080, while the sum is 26.
The square root of 113162561 is about 10637.7892910134.
The cubic root of 113162561 is about 483.6905351037.
The spelling of 113162561 in words is "one hundred thirteen million, one hundred sixty-two thousand, five hundred sixty-one".