111551159 has 4 divisors (see below), whose sum is σ = 114145416. Its totient is φ = 108956904.

The previous prime is 111551149. The next prime is 111551179. The reversal of 111551159 is 951155111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951155111 = 443 ⋅2147077.

It is a cyclic number.

It is not a de Polignac number, because 111551159 - 2⁸ = 111550903 is a prime.

It is a super-2 number, since 2×111551159² = 24887322148486562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111551149) 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, 1297064 + ... + 1297149.

It is an arithmetic number, because the mean of its divisors is an integer number (28536354).

Almost surely, 2^111551159 is an apocalyptic number.

111551159 is a deficient number, since it is larger than the sum of its proper divisors (2594257).

111551159 is an equidigital number, since it uses as much as digits as its factorization.

111551159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594256.

The product of its digits is 1125, while the sum is 29.

The square root of 111551159 is about 10561.7782120247. The cubic root of 111551159 is about 481.3836796455.

The spelling of 111551159 in words is "one hundred eleven million, five hundred fifty-one thousand, one hundred fifty-nine".