111355381 has 8 divisors (see below), whose sum is σ = 113212440. Its totient is φ = 109513728.

The previous prime is 111355369. The next prime is 111355393. The reversal of 111355381 is 183553111.

It is an interprime number because it is at equal distance from previous prime (111355369) and next prime (111355393).

It can be written as a sum of positive squares in 4 ways, for example, as 19847025 + 91508356 = 4455^2 + 9566^2 .

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 111355381 - 2⁹ = 111354869 is a prime.

It is a super-2 number, since 2×111355381² = 24800041755310322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111355481) 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, 11205 + ... + 18661.

It is an arithmetic number, because the mean of its divisors is an integer number (14151555).

Almost surely, 2^111355381 is an apocalyptic number.

It is an amenable number.

111355381 is a deficient number, since it is larger than the sum of its proper divisors (1857059).

111355381 is a wasteful number, since it uses less digits than its factorization.

111355381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7703.

The product of its digits is 1800, while the sum is 28.

The square root of 111355381 is about 10552.5059109199. The cubic root of 111355381 is about 481.1018970588.

The spelling of 111355381 in words is "one hundred eleven million, three hundred fifty-five thousand, three hundred eighty-one".