7211572000 has 96 divisors (see below), whose sum is σ = 18151411824. Its totient is φ = 2814208000.

The previous prime is 7211571979. The next prime is 7211572009. The reversal of 7211572000 is 2751127.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 88887184 + 7122684816 = 9428^2 + 84396^2 .

It is a super-2 number, since 2×7211572000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (7211572009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142014 + ... + 185986.

Almost surely, 2^7211572000 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 7211572000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9075705912).

7211572000 is an abundant number, since it is smaller than the sum of its proper divisors (10939839824).

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

7211572000 is a wasteful number, since it uses less digits than its factorization.

7211572000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44039 (or 44021 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 7211572000 is about 84920.9750297298. The cubic root of 7211572000 is about 1932.0127194758.

The spelling of 7211572000 in words is "seven billion, two hundred eleven million, five hundred seventy-two thousand".