112720217 has 16 divisors (see below), whose sum is σ = 131103360. Its totient is φ = 96129792.

The previous prime is 112720211. The next prime is 112720229. The reversal of 112720217 is 712027211.

It is a cyclic number.

It is not a de Polignac number, because 112720217 - 2⁸ = 112719961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112720192 and 112720201.

It is not an unprimeable number, because it can be changed into a prime (112720211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158 + ... + 15015.

It is an arithmetic number, because the mean of its divisors is an integer number (8193960).

Almost surely, 2^112720217 is an apocalyptic number.

112720217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

112720217 is a deficient number, since it is larger than the sum of its proper divisors (18383143).

112720217 is a wasteful number, since it uses less digits than its factorization.

112720217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15232.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 112720217 is about 10616.9777714753. The cubic root of 112720217 is about 483.0594754063.

Adding to 112720217 its reverse (712027211), we get a palindrome (824747428).

The spelling of 112720217 in words is "one hundred twelve million, seven hundred twenty thousand, two hundred seventeen".