207138331 has 2 divisors, whose sum is σ = 207138332. Its totient is φ = 207138330.

The previous prime is 207138301. The next prime is 207138341. The reversal of 207138331 is 133831702.

207138331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 207138331 - 2¹³ = 207130139 is a prime.

It is a super-2 number, since 2×207138331² = 85812576338931122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 207138331.

It is not a weakly prime, because it can be changed into another prime (207138301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103569165 + 103569166.

It is an arithmetic number, because the mean of its divisors is an integer number (103569166).

Almost surely, 2^207138331 is an apocalyptic number.

207138331 is a deficient number, since it is larger than the sum of its proper divisors (1).

207138331 is an equidigital number, since it uses as much as digits as its factorization.

207138331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 207138331 is about 14392.3011016307. The cubic root of 207138331 is about 591.6799110791.

The spelling of 207138331 in words is "two hundred seven million, one hundred thirty-eight thousand, three hundred thirty-one".