188210081 has 8 divisors (see below), whose sum is σ = 196608384. Its totient is φ = 179829760.

The previous prime is 188210051. The next prime is 188210107. The reversal of 188210081 is 180012881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188210081 - 2⁶ = 188210017 is a prime.

It is a super-2 number, since 2×188210081² = 70846069180053122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188210041) 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 7 ways as a sum of consecutive naturals, for example, 19745 + ... + 27681.

It is an arithmetic number, because the mean of its divisors is an integer number (24576048).

Almost surely, 2^188210081 is an apocalyptic number.

It is an amenable number.

188210081 is a deficient number, since it is larger than the sum of its proper divisors (8398303).

188210081 is a wasteful number, since it uses less digits than its factorization.

188210081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8991.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 188210081 is about 13718.9679276540. The cubic root of 188210081 is about 573.0787353975.

The spelling of 188210081 in words is "one hundred eighty-eight million, two hundred ten thousand, eighty-one".