111264551 has 4 divisors (see below), whose sum is σ = 117120600. Its totient is φ = 105408504.

The previous prime is 111264533. The next prime is 111264553. The reversal of 111264551 is 155462111.

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

It is not a de Polignac number, because 111264551 - 2¹⁸ = 111002407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111264551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111264553) 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, 2927996 + ... + 2928033.

It is an arithmetic number, because the mean of its divisors is an integer number (29280150).

Almost surely, 2^111264551 is an apocalyptic number.

111264551 is a deficient number, since it is larger than the sum of its proper divisors (5856049).

111264551 is an equidigital number, since it uses as much as digits as its factorization.

111264551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5856048.

The product of its digits is 1200, while the sum is 26.

The square root of 111264551 is about 10548.2013158642. The cubic root of 111264551 is about 480.9710535929.

The spelling of 111264551 in words is "one hundred eleven million, two hundred sixty-four thousand, five hundred fifty-one".