2143220401 has 16 divisors (see below), whose sum is σ = 2464754688. Its totient is φ = 1825563600.

The previous prime is 2143220393. The next prime is 2143220407. The reversal of 2143220401 is 1040223412.

2143220401 = 19² + 20² + ... + 1859².

It is not a de Polignac number, because 2143220401 - 2³ = 2143220393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143220407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 902746 + ... + 905116.

It is an arithmetic number, because the mean of its divisors is an integer number (154047168).

Almost surely, 2^2143220401 is an apocalyptic number.

It is an amenable number.

2143220401 is a deficient number, since it is larger than the sum of its proper divisors (321534287).

2143220401 is a wasteful number, since it uses less digits than its factorization.

2143220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2143220401 is about 46294.9284587416. The cubic root of 2143220401 is about 1289.3048356760.

Adding to 2143220401 its reverse (1040223412), we get a palindrome (3183443813).

The spelling of 2143220401 in words is "two billion, one hundred forty-three million, two hundred twenty thousand, four hundred one".