113181601 has 4 divisors (see below), whose sum is σ = 121887892. Its totient is φ = 104475312.

The previous prime is 113181583. The next prime is 113181611. The reversal of 113181601 is 106181311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106181311 = 6907 ⋅15373.

It can be written as a sum of positive squares in 2 ways, for example, as 34398225 + 78783376 = 5865^2 + 8876^2 .

It is a cyclic number.

It is not a de Polignac number, because 113181601 - 2¹⁹ = 112657313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113181611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4353126 + ... + 4353151.

It is an arithmetic number, because the mean of its divisors is an integer number (30471973).

Almost surely, 2^113181601 is an apocalyptic number.

It is an amenable number.

113181601 is a deficient number, since it is larger than the sum of its proper divisors (8706291).

113181601 is an equidigital number, since it uses as much as digits as its factorization.

113181601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8706290.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 113181601 is about 10638.6841761564. The cubic root of 113181601 is about 483.7176611285.

The spelling of 113181601 in words is "one hundred thirteen million, one hundred eighty-one thousand, six hundred one".