2287218621 has 4 divisors (see below), whose sum is σ = 3049624832. Its totient is φ = 1524812412.

The previous prime is 2287218559. The next prime is 2287218623. The reversal of 2287218621 is 1268127822.

2287218621 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 2287218621 - 2¹⁵ = 2287185853 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 2287218621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2287218623) 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, 381203101 + ... + 381203106.

It is an arithmetic number, because the mean of its divisors is an integer number (762406208).

Almost surely, 2^2287218621 is an apocalyptic number.

It is an amenable number.

2287218621 is a deficient number, since it is larger than the sum of its proper divisors (762406211).

2287218621 is an equidigital number, since it uses as much as digits as its factorization.

2287218621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762406210.

The product of its digits is 43008, while the sum is 39.

The square root of 2287218621 is about 47824.8745006194. The cubic root of 2287218621 is about 1317.5564337249.

The spelling of 2287218621 in words is "two billion, two hundred eighty-seven million, two hundred eighteen thousand, six hundred twenty-one".