2199333645 has 18 divisors (see below), whose sum is σ = 3812723694. Its totient is φ = 1172810160.

The previous prime is 2199333641. The next prime is 2199333649. The reversal of 2199333645 is 5463339912.

It is an interprime number because it is at equal distance from previous prime (2199333641) and next prime (2199333649).

It can be written as a sum of positive squares in only one way, i.e., 1759466916 + 439866729 = 41946^2 + 20973^2 .

It is not a de Polignac number, because 2199333645 - 2² = 2199333641 is a prime.

It is a super-3 number, since 3×2199333645³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2199333645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199333641) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 311100 + ... + 318090.

It is an arithmetic number, because the mean of its divisors is an integer number (211817983).

Almost surely, 2^2199333645 is an apocalyptic number.

It is an amenable number.

2199333645 is a deficient number, since it is larger than the sum of its proper divisors (1613390049).

2199333645 is an frugal number, since it uses more digits than its factorization.

2199333645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13993 (or 6999 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 2199333645 is about 46897.0536921031. The cubic root of 2199333645 is about 1300.4601221350.

Multiplying 2199333645 by its sum of digits (45), we get a square (98970014025 = 314595²).

2199333645 divided by its sum of digits (45) gives a square (48874081 = 6991²).

The spelling of 2199333645 in words is "two billion, one hundred ninety-nine million, three hundred thirty-three thousand, six hundred forty-five".