111853681 has 2 divisors, whose sum is σ = 111853682. Its totient is φ = 111853680.

The previous prime is 111853661. The next prime is 111853733. The reversal of 111853681 is 186358111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 30691600 = 9009^2 + 5540^2 .

It is a cyclic number.

It is not a de Polignac number, because 111853681 - 2¹⁷ = 111722609 is a prime.

It is a super-2 number, since 2×111853681² = 25022491906499522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111853631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55926840 + 55926841.

It is an arithmetic number, because the mean of its divisors is an integer number (55926841).

Almost surely, 2^111853681 is an apocalyptic number.

It is an amenable number.

111853681 is a deficient number, since it is larger than the sum of its proper divisors (1).

111853681 is an equidigital number, since it uses as much as digits as its factorization.

111853681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 34.

The square root of 111853681 is about 10576.0900620220. The cubic root of 111853681 is about 481.8184508785.

The spelling of 111853681 in words is "one hundred eleven million, eight hundred fifty-three thousand, six hundred eighty-one".