111818481 has 4 divisors (see below), whose sum is σ = 149091312. Its totient is φ = 74545652.

The previous prime is 111818471. The next prime is 111818491. The reversal of 111818481 is 184818111.

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 an interprime number because it is at equal distance from previous prime (111818471) and next prime (111818491).

It is a cyclic number.

It is not a de Polignac number, because 111818481 - 2¹⁷ = 111687409 is a prime.

It is a super-2 number, since 2×111818481² = 25006745386294722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111818431) 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, 18636411 + ... + 18636416.

It is an arithmetic number, because the mean of its divisors is an integer number (37272828).

Almost surely, 2^111818481 is an apocalyptic number.

It is an amenable number.

111818481 is a deficient number, since it is larger than the sum of its proper divisors (37272831).

111818481 is an equidigital number, since it uses as much as digits as its factorization.

111818481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37272830.

The product of its digits is 2048, while the sum is 33.

The square root of 111818481 is about 10574.4258000139. The cubic root of 111818481 is about 481.7679033277.

The spelling of 111818481 in words is "one hundred eleven million, eight hundred eighteen thousand, four hundred eighty-one".