113145181 has 2 divisors, whose sum is σ = 113145182. Its totient is φ = 113145180.

The previous prime is 113145127. The next prime is 113145187. The reversal of 113145181 is 181541311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78039556 + 35105625 = 8834^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 113145181 - 2¹¹ = 113143133 is a prime.

It is a super-2 number, since 2×113145181² = 25603663967045522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113145187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56572590 + 56572591.

It is an arithmetic number, because the mean of its divisors is an integer number (56572591).

Almost surely, 2^113145181 is an apocalyptic number.

It is an amenable number.

113145181 is a deficient number, since it is larger than the sum of its proper divisors (1).

113145181 is an equidigital number, since it uses as much as digits as its factorization.

113145181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 25.

The square root of 113145181 is about 10636.9723605921. The cubic root of 113145181 is about 483.6657714014.

Adding to 113145181 its reverse (181541311), we get a palindrome (294686492).

The spelling of 113145181 in words is "one hundred thirteen million, one hundred forty-five thousand, one hundred eighty-one".