111354981 has 8 divisors (see below), whose sum is σ = 157207104. Its totient is φ = 69869760.

The previous prime is 111354967. The next prime is 111355009. The reversal of 111354981 is 189453111.

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

It is not a de Polignac number, because 111354981 - 2⁵ = 111354949 is a prime.

It is a super-2 number, since 2×111354981² = 24799863587020722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111354911) 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, 1091665 + ... + 1091766.

It is an arithmetic number, because the mean of its divisors is an integer number (19650888).

Almost surely, 2^111354981 is an apocalyptic number.

It is an amenable number.

111354981 is a deficient number, since it is larger than the sum of its proper divisors (45852123).

111354981 is a wasteful number, since it uses less digits than its factorization.

111354981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183451.

The product of its digits is 4320, while the sum is 33.

The square root of 111354981 is about 10552.4869580587. The cubic root of 111354981 is about 481.1013210022.

The spelling of 111354981 in words is "one hundred eleven million, three hundred fifty-four thousand, nine hundred eighty-one".