2128182031 has 4 divisors (see below), whose sum is σ = 2129093464. Its totient is φ = 2127270600.

The previous prime is 2128181971. The next prime is 2128182073. The reversal of 2128182031 is 1302818212.

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 2128182031 - 2²⁵ = 2094627599 is a prime.

It is a super-2 number, since 2×2128182031² = 9058317514142569922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128182131) 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, 452205 + ... + 456886.

It is an arithmetic number, because the mean of its divisors is an integer number (532273366).

Almost surely, 2^2128182031 is an apocalyptic number.

2128182031 is a deficient number, since it is larger than the sum of its proper divisors (911433).

2128182031 is an equidigital number, since it uses as much as digits as its factorization.

2128182031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911432.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 2128182031 is about 46132.2233476775. The cubic root of 2128182031 is about 1286.2821927562.

The spelling of 2128182031 in words is "two billion, one hundred twenty-eight million, one hundred eighty-two thousand, thirty-one".