2372182155721 has 27 divisors (see below), whose sum is σ = 2806234124967. Its totient is φ = 1999411752240.

The previous prime is 2372182155709. The next prime is 2372182155779. The reversal of 2372182155721 is 1275512812732.

The square root of 2372182155721 is 1540189.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 77138952121 + 2295043203600 = 277739^2 + 1514940^2 .

It is not a de Polignac number, because 2372182155721 - 2¹⁹ = 2372181631433 is a prime.

It is a super-2 number, since 2×2372182155721² (a number of 26 digits) contains 22 as substring.

Its product of digits (470400) is a multiple of the sum of its prime divisors (3675).

It is not an unprimeable number, because it can be changed into a prime (2372182155701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 657658900 + ... + 657662506.

It is an arithmetic number, because the mean of its divisors is an integer number (103934597221).

Almost surely, 2^{2372182155721} is an apocalyptic number.

2372182155721 is the 1540189-th square number.

2372182155721 is the 770095-th centered octagonal number.

It is an amenable number.

2372182155721 is a deficient number, since it is larger than the sum of its proper divisors (434051969246).

2372182155721 is an frugal number, since it uses more digits than its factorization.

2372182155721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7350 (or 3675 counting only the distinct ones).

The product of its digits is 470400, while the sum is 46.

The spelling of 2372182155721 in words is "two trillion, three hundred seventy-two billion, one hundred eighty-two million, one hundred fifty-five thousand, seven hundred twenty-one".