207205145 has 16 divisors (see below), whose sum is σ = 293967360. Its totient is φ = 137183424.

The previous prime is 207205123. The next prime is 207205169. The reversal of 207205145 is 541502702.

207205145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 207205145 - 2⁶ = 207205081 is a prime.

It is a super-2 number, since 2×207205145² = 85867944228942050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101057 + ... + 103086.

It is an arithmetic number, because the mean of its divisors is an integer number (18372960).

Almost surely, 2^207205145 is an apocalyptic number.

It is an amenable number.

207205145 is a deficient number, since it is larger than the sum of its proper divisors (86762215).

207205145 is a wasteful number, since it uses less digits than its factorization.

207205145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204184.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 207205145 is about 14394.6220860431. The cubic root of 207205145 is about 591.7435211502.

Adding to 207205145 its reverse (541502702), we get a palindrome (748707847).

The spelling of 207205145 in words is "two hundred seven million, two hundred five thousand, one hundred forty-five".