113155221 has 8 divisors (see below), whose sum is σ = 150952320. Its totient is φ = 75397472.

The previous prime is 113155199. The next prime is 113155243. The reversal of 113155221 is 122551311.

It is an interprime number because it is at equal distance from previous prime (113155199) and next prime (113155243).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113155221 - 2⁶ = 113155157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113155261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 15218.

It is an arithmetic number, because the mean of its divisors is an integer number (18869040).

Almost surely, 2^113155221 is an apocalyptic number.

It is an amenable number.

113155221 is a deficient number, since it is larger than the sum of its proper divisors (37797099).

113155221 is a wasteful number, since it uses less digits than its factorization.

113155221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19675.

The product of its digits is 300, while the sum is 21.

The square root of 113155221 is about 10637.4442889258. Note that the first 3 decimals coincide. The cubic root of 113155221 is about 483.6800770945.

The spelling of 113155221 in words is "one hundred thirteen million, one hundred fifty-five thousand, two hundred twenty-one".