2243121660 has 240 divisors, whose sum is σ = 7757408736. Its totient is φ = 539094528.

The previous prime is 2243121659. The next prime is 2243121691. The reversal of 2243121660 is 661213422.

It is a super-2 number, since 2×2243121660² = 10063189563122311200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 904342 + ... + 906818.

Almost surely, 2^2243121660 is an apocalyptic number.

2243121660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2243121660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3878704368).

2243121660 is an abundant number, since it is smaller than the sum of its proper divisors (5514287076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2243121660 is a wasteful number, since it uses less digits than its factorization.

2243121660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2243121660 is about 47361.6053359681. The cubic root of 2243121660 is about 1309.0340489034.

The spelling of 2243121660 in words is "two billion, two hundred forty-three million, one hundred twenty-one thousand, six hundred sixty".