111553291 has 4 divisors (see below), whose sum is σ = 111977712. Its totient is φ = 111128872.

The previous prime is 111553279. The next prime is 111553301. The reversal of 111553291 is 192355111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111553291 - 2¹⁵ = 111520523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111553891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211816 + ... + 212341.

It is an arithmetic number, because the mean of its divisors is an integer number (27994428).

Almost surely, 2^111553291 is an apocalyptic number.

111553291 is a deficient number, since it is larger than the sum of its proper divisors (424421).

111553291 is an equidigital number, since it uses as much as digits as its factorization.

111553291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424420.

The product of its digits is 1350, while the sum is 28.

The square root of 111553291 is about 10561.8791415164. The cubic root of 111553291 is about 481.3867464102.

The spelling of 111553291 in words is "one hundred eleven million, five hundred fifty-three thousand, two hundred ninety-one".