643110252 has 48 divisors (see below), whose sum is σ = 1630540800. Its totient is φ = 196534080.

The previous prime is 643110229. The next prime is 643110253. The reversal of 643110252 is 252011346.

It is not an unprimeable number, because it can be changed into a prime (643110253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38427 + ... + 52562.

It is an arithmetic number, because the mean of its divisors is an integer number (33969600).

Almost surely, 2^643110252 is an apocalyptic number.

643110252 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

643110252 is an abundant number, since it is smaller than the sum of its proper divisors (987430548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643110252 is a wasteful number, since it uses less digits than its factorization.

643110252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91046 (or 91044 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 643110252 is about 25359.6185302540. The cubic root of 643110252 is about 863.1676279252.

Adding to 643110252 its reverse (252011346), we get a palindrome (895121598).

The spelling of 643110252 in words is "six hundred forty-three million, one hundred ten thousand, two hundred fifty-two".