2131969841 has 4 divisors (see below), whose sum is σ = 2244178800. Its totient is φ = 2019760884.

The previous prime is 2131969823. The next prime is 2131969877. The reversal of 2131969841 is 1489691312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131969841 - 2²² = 2127775537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131969792 and 2131969801.

It is not an unprimeable number, because it can be changed into a prime (2131966841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56104451 + ... + 56104488.

It is an arithmetic number, because the mean of its divisors is an integer number (561044700).

Almost surely, 2^2131969841 is an apocalyptic number.

It is an amenable number.

2131969841 is a deficient number, since it is larger than the sum of its proper divisors (112208959).

2131969841 is a wasteful number, since it uses less digits than its factorization.

2131969841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112208958.

The product of its digits is 93312, while the sum is 44.

The square root of 2131969841 is about 46173.2589384808. The cubic root of 2131969841 is about 1287.0448632378.

The spelling of 2131969841 in words is "two billion, one hundred thirty-one million, nine hundred sixty-nine thousand, eight hundred forty-one".