207145385 has 16 divisors (see below), whose sum is σ = 252026640. Its totient is φ = 163430400.

The previous prime is 207145381. The next prime is 207145387. The reversal of 207145385 is 583541702.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10837264 + 196308121 = 3292^2 + 14011^2 .

It is not a de Polignac number, because 207145385 - 2² = 207145381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207145381) 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 15 ways as a sum of consecutive naturals, for example, 128585 + ... + 130185.

It is an arithmetic number, because the mean of its divisors is an integer number (15751665).

Almost surely, 2^207145385 is an apocalyptic number.

It is an amenable number.

207145385 is a deficient number, since it is larger than the sum of its proper divisors (44881255).

207145385 is a wasteful number, since it uses less digits than its factorization.

207145385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 207145385 is about 14392.5461611210. The cubic root of 207145385 is about 591.6866274647.

The spelling of 207145385 in words is "two hundred seven million, one hundred forty-five thousand, three hundred eighty-five".