2221980437 has 4 divisors (see below), whose sum is σ = 2222146080. Its totient is φ = 2221814796.

The previous prime is 2221980433. The next prime is 2221980451. The reversal of 2221980437 is 7340891222.

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 2221980437 - 2² = 2221980433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221980437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221980433) 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, 60737 + ... + 90182.

It is an arithmetic number, because the mean of its divisors is an integer number (555536520).

Almost surely, 2^2221980437 is an apocalyptic number.

It is an amenable number.

2221980437 is a deficient number, since it is larger than the sum of its proper divisors (165643).

2221980437 is a wasteful number, since it uses less digits than its factorization.

2221980437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165642.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2221980437 is about 47137.8874897889. The cubic root of 2221980437 is about 1304.9085508159.

The spelling of 2221980437 in words is "two billion, two hundred twenty-one million, nine hundred eighty thousand, four hundred thirty-seven".