2135523207 has 4 divisors (see below), whose sum is σ = 2847364280. Its totient is φ = 1423682136.

The previous prime is 2135523179. The next prime is 2135523209. The reversal of 2135523207 is 7023255312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2135523207 - 2⁷ = 2135523079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135523209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355920532 + ... + 355920537.

It is an arithmetic number, because the mean of its divisors is an integer number (711841070).

Almost surely, 2^2135523207 is an apocalyptic number.

2135523207 is a deficient number, since it is larger than the sum of its proper divisors (711841073).

2135523207 is an equidigital number, since it uses as much as digits as its factorization.

2135523207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711841072.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 2135523207 is about 46211.7215325290. The cubic root of 2135523207 is about 1287.7595079629.

Adding to 2135523207 its reverse (7023255312), we get a palindrome (9158778519).

The spelling of 2135523207 in words is "two billion, one hundred thirty-five million, five hundred twenty-three thousand, two hundred seven".