7215042672 has 240 divisors, whose sum is σ = 22092395520. Its totient is φ = 2189721600.

The previous prime is 7215042647. The next prime is 7215042697. The reversal of 7215042672 is 2762405127.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7215042647) and next prime (7215042697).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21797547 + ... + 21797877.

It is an arithmetic number, because the mean of its divisors is an integer number (92051648).

Almost surely, 2^7215042672 is an apocalyptic number.

7215042672 is a gapful number since it is divisible by the number (72) 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 7215042672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11046197760).

7215042672 is an abundant number, since it is smaller than the sum of its proper divisors (14877352848).

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

7215042672 is a wasteful number, since it uses less digits than its factorization.

7215042672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 7215042672 is about 84941.4072876121. The cubic root of 7215042672 is about 1932.3226060049.

Adding to 7215042672 its reverse (2762405127), we get a palindrome (9977447799).

The spelling of 7215042672 in words is "seven billion, two hundred fifteen million, forty-two thousand, six hundred seventy-two".