113156161 has 2 divisors, whose sum is σ = 113156162. Its totient is φ = 113156160.

The previous prime is 113156149. The next prime is 113156167. The reversal of 113156161 is 161651311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82464561 + 30691600 = 9081^2 + 5540^2 .

It is an emirp because it is prime and its reverse (161651311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113156161 - 2⁵ = 113156129 is a prime.

It is not a weakly prime, because it can be changed into another prime (113156167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56578080 + 56578081.

It is an arithmetic number, because the mean of its divisors is an integer number (56578081).

Almost surely, 2^113156161 is an apocalyptic number.

It is an amenable number.

113156161 is a deficient number, since it is larger than the sum of its proper divisors (1).

113156161 is an equidigital number, since it uses as much as digits as its factorization.

113156161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 25.

The square root of 113156161 is about 10637.4884723792. The cubic root of 113156161 is about 483.6814164289.

The spelling of 113156161 in words is "one hundred thirteen million, one hundred fifty-six thousand, one hundred sixty-one".