7152221844 has 36 divisors (see below), whose sum is σ = 19142713044. Its totient is φ = 2243834112.

The previous prime is 7152221729. The next prime is 7152221893. The reversal of 7152221844 is 4481222517.

7152221844 is a `hidden beast` number, since 71 + 522 + 21 + 8 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4517452944 + 2634768900 = 67212^2 + 51330^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 7152221799 and 7152221808.

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 11 ways as a sum of consecutive naturals, for example, 5842707 + ... + 5843930.

It is an arithmetic number, because the mean of its divisors is an integer number (531742029).

Almost surely, 2^7152221844 is an apocalyptic number.

It is an amenable number.

7152221844 is an abundant number, since it is smaller than the sum of its proper divisors (11990491200).

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

7152221844 is a wasteful number, since it uses less digits than its factorization.

7152221844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11686664 (or 11686659 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 7152221844 is about 84570.8096449360. The cubic root of 7152221844 is about 1926.6980547615.

The spelling of 7152221844 in words is "seven billion, one hundred fifty-two million, two hundred twenty-one thousand, eight hundred forty-four".