216229650025 has 9 divisors (see below), whose sum is σ = 268127649093. Its totient is φ = 172981860000.

The previous prime is 216229650019. The next prime is 216229650053. The reversal of 216229650025 is 520056922612.

The square root of 216229650025 is 465005.

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

It can be written as a sum of positive squares in 4 ways, for example, as 12969337689 + 203260312336 = 113883^2 + 450844^2 .

It is not a de Polignac number, because 216229650025 - 2⁷ = 216229649897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216229650025.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2278525 + ... + 2371525.

Almost surely, 2^216229650025 is an apocalyptic number.

216229650025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216229650025 is the 465005-th square number.

216229650025 is the 232503-rd centered octagonal number.

It is an amenable number.

216229650025 is a deficient number, since it is larger than the sum of its proper divisors (51897999068).

216229650025 is an frugal number, since it uses more digits than its factorization.

216229650025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186012 (or 93006 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 216229650025 in words is "two hundred sixteen billion, two hundred twenty-nine million, six hundred fifty thousand, twenty-five".