111540213 has 32 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 68267520.

The previous prime is 111540211. The next prime is 111540251. The reversal of 111540213 is 312045111.

111540213 is a `hidden beast` number, since 111 + 540 + 2 + 13 = 666.

It is not a de Polignac number, because 111540213 - 2¹ = 111540211 is a prime.

It is a super-3 number, since 3×111540213³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111540211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15856 + ... + 21782.

It is an arithmetic number, because the mean of its divisors is an integer number (5601960).

Almost surely, 2^111540213 is an apocalyptic number.

It is an amenable number.

111540213 is a deficient number, since it is larger than the sum of its proper divisors (67722507).

111540213 is a wasteful number, since it uses less digits than its factorization.

111540213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994 (or 5988 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 111540213 is about 10561.2600100556. The cubic root of 111540213 is about 481.3679338114.

Adding to 111540213 its reverse (312045111), we get a palindrome (423585324).

It can be divided in two parts, 1115 and 40213, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 111540213 in words is "one hundred eleven million, five hundred forty thousand, two hundred thirteen".