113245221 has 4 divisors (see below), whose sum is σ = 150993632. Its totient is φ = 75496812.

The previous prime is 113245217. The next prime is 113245243. The reversal of 113245221 is 122542311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 113245221 - 2² = 113245217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113245021) 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, 18874201 + ... + 18874206.

It is an arithmetic number, because the mean of its divisors is an integer number (37748408).

Almost surely, 2^113245221 is an apocalyptic number.

It is an amenable number.

113245221 is a deficient number, since it is larger than the sum of its proper divisors (37748411).

113245221 is an equidigital number, since it uses as much as digits as its factorization.

113245221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37748410.

The product of its digits is 480, while the sum is 21.

The square root of 113245221 is about 10641.6737875205. The cubic root of 113245221 is about 483.8082776040.

Adding to 113245221 its reverse (122542311), we get a palindrome (235787532).

The spelling of 113245221 in words is "one hundred thirteen million, two hundred forty-five thousand, two hundred twenty-one".