111541541 has 4 divisors (see below), whose sum is σ = 111566784. Its totient is φ = 111516300.

The previous prime is 111541531. The next prime is 111541583. The reversal of 111541541 is 145145111.

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 a cyclic number.

It is not a de Polignac number, because 111541541 - 2⁶ = 111541477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111541531) 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, 4055 + ... + 15476.

It is an arithmetic number, because the mean of its divisors is an integer number (27891696).

Almost surely, 2^111541541 is an apocalyptic number.

It is an amenable number.

111541541 is a deficient number, since it is larger than the sum of its proper divisors (25243).

111541541 is an equidigital number, since it uses as much as digits as its factorization.

111541541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25242.

The product of its digits is 400, while the sum is 23.

The square root of 111541541 is about 10561.3228811546. The cubic root of 111541541 is about 481.3698441959.

Adding to 111541541 its reverse (145145111), we get a palindrome (256686652).

The spelling of 111541541 in words is "one hundred eleven million, five hundred forty-one thousand, five hundred forty-one".