7220173720 has 64 divisors (see below), whose sum is σ = 16437888000. Its totient is φ = 2854051200.

The previous prime is 7220173687. The next prime is 7220173721. The reversal of 7220173720 is 273710227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220173721) 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, 1198957 + ... + 1204963.

It is an arithmetic number, because the mean of its divisors is an integer number (256842000).

Almost surely, 2^7220173720 is an apocalyptic number.

It is an amenable number.

7220173720 is an abundant number, since it is smaller than the sum of its proper divisors (9217714280).

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

7220173720 is a wasteful number, since it uses less digits than its factorization.

7220173720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368 (or 6364 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 7220173720 is about 84971.6053749722. The cubic root of 7220173720 is about 1932.7805608213.

Adding to 7220173720 its reverse (273710227), we get a palindrome (7493883947).

The spelling of 7220173720 in words is "seven billion, two hundred twenty million, one hundred seventy-three thousand, seven hundred twenty".