252721452647 has 8 divisors (see below), whose sum is σ = 259726131600. Its totient is φ = 245725951104.

The previous prime is 252721452631. The next prime is 252721452667. The reversal of 252721452647 is 746254127252.

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

It is a cyclic number.

It is not a de Polignac number, because 252721452647 - 2⁴ = 252721452631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252721452667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2238497 + ... + 2348682.

It is an arithmetic number, because the mean of its divisors is an integer number (32465766450).

Almost surely, 2^252721452647 is an apocalyptic number.

252721452647 is a deficient number, since it is larger than the sum of its proper divisors (7004678953).

252721452647 is a wasteful number, since it uses less digits than its factorization.

252721452647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588705.

The product of its digits is 1881600, while the sum is 47.

Adding to 252721452647 its reverse (746254127252), we get a palindrome (998975579899).

The spelling of 252721452647 in words is "two hundred fifty-two billion, seven hundred twenty-one million, four hundred fifty-two thousand, six hundred forty-seven".