643232025 has 36 divisors (see below), whose sum is σ = 1158608880. Its totient is φ = 341119200.

The previous prime is 643231997. The next prime is 643232033. The reversal of 643232025 is 520232346.

643232025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 643232025 - 2⁸ = 643231769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 643232025.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32290 + ... + 48260.

It is an arithmetic number, because the mean of its divisors is an integer number (32183580).

Almost surely, 2^643232025 is an apocalyptic number.

It is an amenable number.

643232025 is a deficient number, since it is larger than the sum of its proper divisors (515376855).

643232025 is a wasteful number, since it uses less digits than its factorization.

643232025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16166 (or 16158 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 643232025 is about 25362.0193399500. The cubic root of 643232025 is about 863.2221047834. Note that the first 3 decimals are identical.

The spelling of 643232025 in words is "six hundred forty-three million, two hundred thirty-two thousand, twenty-five".