2221542072 has 64 divisors (see below), whose sum is σ = 6202080000. Its totient is φ = 736778592.

The previous prime is 2221542047. The next prime is 2221542079. The reversal of 2221542072 is 2702451222.

2221542072 is a `hidden beast` number, since 22 + 215 + 420 + 7 + 2 = 666.

It is a super-3 number, since 3×2221542072³ (a number of 29 digits) contains 333 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 not an unprimeable number, because it can be changed into a prime (2221542079) 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, 17143 + ... + 68825.

It is an arithmetic number, because the mean of its divisors is an integer number (96907500).

Almost surely, 2^2221542072 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 2221542072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3101040000).

2221542072 is an abundant number, since it is smaller than the sum of its proper divisors (3980537928).

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

2221542072 is a wasteful number, since it uses less digits than its factorization.

2221542072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51897 (or 51887 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 2221542072 is about 47133.2374445041. The cubic root of 2221542072 is about 1304.8227318997.

Adding to 2221542072 its reverse (2702451222), we get a palindrome (4923993294).

The spelling of 2221542072 in words is "two billion, two hundred twenty-one million, five hundred forty-two thousand, seventy-two".