2215855530625 has 45 divisors (see below), whose sum is σ = 3044100372159. Its totient is φ = 1611233580000.

The previous prime is 2215855530611. The next prime is 2215855530661. The reversal of 2215855530625 is 5260355585122.

The square root of 2215855530625 is 1488575.

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

It can be written as a sum of positive squares in 7 ways, for example, as 2127096820849 + 88758709776 = 1458457^2 + 297924^2 .

It is not a de Polignac number, because 2215855530625 - 2¹¹ = 2215855528577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 409355419 + ... + 409360831.

Almost surely, 2^{2215855530625} is an apocalyptic number.

2215855530625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2215855530625 is the 1488575-th square number.

2215855530625 is the 744288-th centered octagonal number.

It is an amenable number.

2215855530625 is a deficient number, since it is larger than the sum of its proper divisors (828244841534).

2215855530625 is an frugal number, since it uses more digits than its factorization.

2215855530625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10868 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 3600000, while the sum is 49.

Multiplying 2215855530625 by its sum of digits (49), we get a square (108576921000625 = 10420025²).

The spelling of 2215855530625 in words is "two trillion, two hundred fifteen billion, eight hundred fifty-five million, five hundred thirty thousand, six hundred twenty-five".