2143220501 has 4 divisors (see below), whose sum is σ = 2256021600. Its totient is φ = 2030419404.

The previous prime is 2143220483. The next prime is 2143220503. The reversal of 2143220501 is 1050223412.

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-2143220501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143220503) 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, 56400521 + ... + 56400558.

It is an arithmetic number, because the mean of its divisors is an integer number (564005400).

Almost surely, 2^2143220501 is an apocalyptic number.

It is an amenable number.

2143220501 is a deficient number, since it is larger than the sum of its proper divisors (112801099).

2143220501 is a wasteful number, since it uses less digits than its factorization.

2143220501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112801098.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2143220501 is about 46294.9295387735. The cubic root of 2143220501 is about 1289.3048557284.

Adding to 2143220501 its reverse (1050223412), we get a palindrome (3193443913).

The spelling of 2143220501 in words is "two billion, one hundred forty-three million, two hundred twenty thousand, five hundred one".