252421643622 has 8 divisors (see below), whose sum is σ = 504843287256. Its totient is φ = 84140547872.

The previous prime is 252421643581. The next prime is 252421643651. The reversal of 252421643622 is 226346124252.

It is a sphenic number, since it is the product of 3 distinct primes.

252421643622 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21035136963 + ... + 21035136974.

It is an arithmetic number, because the mean of its divisors is an integer number (63105410907).

Almost surely, 2^252421643622 is an apocalyptic number.

252421643622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

252421643622 is a wasteful number, since it uses less digits than its factorization.

252421643622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42070273942.

The product of its digits is 276480, while the sum is 39.

Adding to 252421643622 its reverse (226346124252), we get a palindrome (478767767874).

The spelling of 252421643622 in words is "two hundred fifty-two billion, four hundred twenty-one million, six hundred forty-three thousand, six hundred twenty-two".