112778551 has 4 divisors (see below), whose sum is σ = 115401352. Its totient is φ = 110155752.

The previous prime is 112778531. The next prime is 112778573. The reversal of 112778551 is 155877211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155877211 = 7 ⋅22268173.

It is a cyclic number.

It is not a de Polignac number, because 112778551 - 2⁷ = 112778423 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 112778551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112778531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311336 + ... + 1311421.

It is an arithmetic number, because the mean of its divisors is an integer number (28850338).

Almost surely, 2^112778551 is an apocalyptic number.

112778551 is a deficient number, since it is larger than the sum of its proper divisors (2622801).

112778551 is an equidigital number, since it uses as much as digits as its factorization.

112778551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622800.

The product of its digits is 19600, while the sum is 37.

The square root of 112778551 is about 10619.7246197818. The cubic root of 112778551 is about 483.1427906348.

The spelling of 112778551 in words is "one hundred twelve million, seven hundred seventy-eight thousand, five hundred fifty-one".