4221161472 has 312 divisors, whose sum is σ = 13177418688. Its totient is φ = 1196687360.

The previous prime is 4221161423. The next prime is 4221161473. The reversal of 4221161472 is 2741611224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221161473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25276333 + ... + 25276499.

Almost surely, 2^4221161472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221161472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6588709344).

4221161472 is an abundant number, since it is smaller than the sum of its proper divisors (8956257216).

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

4221161472 is a wasteful number, since it uses less digits than its factorization.

4221161472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 200 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 4221161472 is about 64970.4661519371. The cubic root of 4221161472 is about 1616.1338320034.

Adding to 4221161472 its reverse (2741611224), we get a palindrome (6962772696).

The spelling of 4221161472 in words is "four billion, two hundred twenty-one million, one hundred sixty-one thousand, four hundred seventy-two".