2143431401 has 4 divisors (see below), whose sum is σ = 2256243600. Its totient is φ = 2030619204.

The previous prime is 2143431391. The next prime is 2143431403. The reversal of 2143431401 is 1041343412.

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 a de Polignac number, because none of the positive numbers 2^k-2143431401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143431403) 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, 56406071 + ... + 56406108.

It is an arithmetic number, because the mean of its divisors is an integer number (564060900).

Almost surely, 2^2143431401 is an apocalyptic number.

It is an amenable number.

2143431401 is a deficient number, since it is larger than the sum of its proper divisors (112812199).

2143431401 is a wasteful number, since it uses less digits than its factorization.

2143431401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112812198.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2143431401 is about 46297.2072699855. The cubic root of 2143431401 is about 1289.3471449649.

Adding to 2143431401 its reverse (1041343412), we get a palindrome (3184774813).

The spelling of 2143431401 in words is "two billion, one hundred forty-three million, four hundred thirty-one thousand, four hundred one".