111388213 has 8 divisors (see below), whose sum is σ = 112491288. Its totient is φ = 110290944.

The previous prime is 111388181. The next prime is 111388223. The reversal of 111388213 is 312883111.

It can be written as a sum of positive squares in 4 ways, for example, as 1096209 + 110292004 = 1047^2 + 10502^2 .

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 111388213 - 2⁵ = 111388181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111388223) 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, 43731 + ... + 46207.

It is an arithmetic number, because the mean of its divisors is an integer number (14061411).

Almost surely, 2^111388213 is an apocalyptic number.

It is an amenable number.

111388213 is a deficient number, since it is larger than the sum of its proper divisors (1103075).

111388213 is a wasteful number, since it uses less digits than its factorization.

111388213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903.

The product of its digits is 1152, while the sum is 28.

The square root of 111388213 is about 10554.0614457184. The cubic root of 111388213 is about 481.1491750775.

The spelling of 111388213 in words is "one hundred eleven million, three hundred eighty-eight thousand, two hundred thirteen".