2919223221 has 16 divisors (see below), whose sum is σ = 4254202368. Its totient is φ = 1772582400.

The previous prime is 2919223183. The next prime is 2919223231. The reversal of 2919223221 is 1223229192.

It is a happy number.

It is not a de Polignac number, because 2919223221 - 2¹⁴ = 2919206837 is a prime.

It is a super-2 number, since 2×2919223221² = 17043728428051229682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2919223231) 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, 921640 + ... + 924801.

It is an arithmetic number, because the mean of its divisors is an integer number (265887648).

Almost surely, 2^2919223221 is an apocalyptic number.

It is an amenable number.

2919223221 is a deficient number, since it is larger than the sum of its proper divisors (1334979147).

2919223221 is a wasteful number, since it uses less digits than its factorization.

2919223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846492.

The product of its digits is 7776, while the sum is 33.

The square root of 2919223221 is about 54029.8363961987. The cubic root of 2919223221 is about 1429.1871463969.

The spelling of 2919223221 in words is "two billion, nine hundred nineteen million, two hundred twenty-three thousand, two hundred twenty-one".