2131440401 has 4 divisors (see below), whose sum is σ = 2131534704. Its totient is φ = 2131346100.

The previous prime is 2131440379. The next prime is 2131440403. The reversal of 2131440401 is 1040441312.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2131440401 - 2¹⁰ = 2131439377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131440403) 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, 9206 + ... + 65936.

It is an arithmetic number, because the mean of its divisors is an integer number (532883676).

Almost surely, 2^2131440401 is an apocalyptic number.

It is an amenable number.

2131440401 is a deficient number, since it is larger than the sum of its proper divisors (94303).

2131440401 is an equidigital number, since it uses as much as digits as its factorization.

2131440401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94302.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2131440401 is about 46167.5253939390. The cubic root of 2131440401 is about 1286.9383155382.

Adding to 2131440401 its reverse (1040441312), we get a palindrome (3171881713).

The spelling of 2131440401 in words is "two billion, one hundred thirty-one million, four hundred forty thousand, four hundred one".