207136231 has 2 divisors, whose sum is σ = 207136232. Its totient is φ = 207136230.

The previous prime is 207136207. The next prime is 207136261. The reversal of 207136231 is 132631702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 207136231 - 2¹¹ = 207134183 is a prime.

It is a super-2 number, since 2×207136231² = 85810836385770722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 207136196 and 207136205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207136261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103568115 + 103568116.

It is an arithmetic number, because the mean of its divisors is an integer number (103568116).

Almost surely, 2^207136231 is an apocalyptic number.

207136231 is a deficient number, since it is larger than the sum of its proper divisors (1).

207136231 is an equidigital number, since it uses as much as digits as its factorization.

207136231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 207136231 is about 14392.2281457737. The cubic root of 207136231 is about 591.6779115586.

Adding to 207136231 its reverse (132631702), we get a palindrome (339767933).

The spelling of 207136231 in words is "two hundred seven million, one hundred thirty-six thousand, two hundred thirty-one".