2125806819 has 8 divisors (see below), whose sum is σ = 2838903552. Its totient is φ = 1414957320.

The previous prime is 2125806817. The next prime is 2125806833. The reversal of 2125806819 is 9186085212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2125806819 - 2¹ = 2125806817 is a prime.

It is a super-2 number, since 2×2125806819² = 9038109263413797522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2125806817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559599 + ... + 563384.

It is an arithmetic number, because the mean of its divisors is an integer number (354862944).

Almost surely, 2^2125806819 is an apocalyptic number.

2125806819 is a deficient number, since it is larger than the sum of its proper divisors (713096733).

2125806819 is a wasteful number, since it uses less digits than its factorization.

2125806819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123617.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 2125806819 is about 46106.4726367134. The cubic root of 2125806819 is about 1285.8034852382.

The spelling of 2125806819 in words is "two billion, one hundred twenty-five million, eight hundred six thousand, eight hundred nineteen".