2153128507 has 4 divisors (see below), whose sum is σ = 2266451080. Its totient is φ = 2039805936.

The previous prime is 2153128441. The next prime is 2153128517. The reversal of 2153128507 is 7058213512.

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

It is a cyclic number.

It is not a de Polignac number, because 2153128507 - 2²³ = 2144739899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153128517) 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, 56661258 + ... + 56661295.

It is an arithmetic number, because the mean of its divisors is an integer number (566612770).

Almost surely, 2^2153128507 is an apocalyptic number.

2153128507 is a deficient number, since it is larger than the sum of its proper divisors (113322573).

2153128507 is a wasteful number, since it uses less digits than its factorization.

2153128507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113322572.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 2153128507 is about 46401.8157726613. The cubic root of 2153128507 is about 1291.2886001967.

The spelling of 2153128507 in words is "two billion, one hundred fifty-three million, one hundred twenty-eight thousand, five hundred seven".