115720111 has 16 divisors (see below), whose sum is σ = 128464000. Its totient is φ = 103576320.

The previous prime is 115720103. The next prime is 115720123. The reversal of 115720111 is 111027511.

It is a cyclic number.

It is not a de Polignac number, because 115720111 - 2³ = 115720103 is a prime.

It is a super-2 number, since 2×115720111² = 26782288179704642, 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 (115720711) 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, 56890 + ... + 58888.

It is an arithmetic number, because the mean of its divisors is an integer number (8029000).

Almost surely, 2^115720111 is an apocalyptic number.

115720111 is a deficient number, since it is larger than the sum of its proper divisors (12743889).

115720111 is a wasteful number, since it uses less digits than its factorization.

115720111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146.

The product of its (nonzero) digits is 70, while the sum is 19.

The square root of 115720111 is about 10757.3282463630. The cubic root of 115720111 is about 487.3073335523.

Adding to 115720111 its reverse (111027511), we get a palindrome (226747622).

The spelling of 115720111 in words is "one hundred fifteen million, seven hundred twenty thousand, one hundred eleven".