216633224025 has 72 divisors (see below), whose sum is σ = 413135030880. Its totient is φ = 108133547520.

The previous prime is 216633224009. The next prime is 216633224029. The reversal of 216633224025 is 520422336612.

216633224025 is a `hidden beast` number, since 2 + 1 + 66 + 332 + 240 + 25 = 666.

It is not a de Polignac number, because 216633224025 - 2⁴ = 216633224009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216633224029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 526474 + ... + 842876.

It is an arithmetic number, because the mean of its divisors is an integer number (5737986540).

Almost surely, 2^216633224025 is an apocalyptic number.

216633224025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216633224025 is a deficient number, since it is larger than the sum of its proper divisors (196501806855).

216633224025 is a wasteful number, since it uses less digits than its factorization.

216633224025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316615 (or 316607 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 216633224025 in words is "two hundred sixteen billion, six hundred thirty-three million, two hundred twenty-four thousand, twenty-five".