207243081 has 6 divisors (see below), whose sum is σ = 299351130. Its totient is φ = 138162048.

The previous prime is 207243067. The next prime is 207243083. The reversal of 207243081 is 180342702.

It can be written as a sum of positive squares in only one way, i.e., 204947856 + 2295225 = 14316^2 + 1515^2 .

It is not a de Polignac number, because 207243081 - 2⁷ = 207242953 is a prime.

It is a super-2 number, since 2×207243081² = 85899389244745122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (207243083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11513496 + ... + 11513513.

It is an arithmetic number, because the mean of its divisors is an integer number (49891855).

Almost surely, 2^207243081 is an apocalyptic number.

It is an amenable number.

207243081 is a deficient number, since it is larger than the sum of its proper divisors (92108049).

207243081 is a wasteful number, since it uses less digits than its factorization.

207243081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23027015 (or 23027012 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 207243081 is about 14395.9397400795. The cubic root of 207243081 is about 591.7796319208.

Adding to 207243081 its reverse (180342702), we get a palindrome (387585783).

The spelling of 207243081 in words is "two hundred seven million, two hundred forty-three thousand, eighty-one".