111552491 has 4 divisors (see below), whose sum is σ = 111810552. Its totient is φ = 111294432.

The previous prime is 111552457. The next prime is 111552499. The reversal of 111552491 is 194255111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194255111 = 347 ⋅559813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111552491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111552499) 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, 128381 + ... + 129246.

It is an arithmetic number, because the mean of its divisors is an integer number (27952638).

Almost surely, 2^111552491 is an apocalyptic number.

111552491 is a deficient number, since it is larger than the sum of its proper divisors (258061).

111552491 is an equidigital number, since it uses as much as digits as its factorization.

111552491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258060.

The product of its digits is 1800, while the sum is 29.

The square root of 111552491 is about 10561.8412694000. The cubic root of 111552491 is about 481.3855956588.

The spelling of 111552491 in words is "one hundred eleven million, five hundred fifty-two thousand, four hundred ninety-one".