252220344240221 has 16 divisors (see below), whose sum is σ = 292333830762240. Its totient is φ = 213127820828160.

The previous prime is 252220344240199. The next prime is 252220344240251. The reversal of 252220344240221 is 122042443022252.

It is not a de Polignac number, because 252220344240221 - 2³⁸ = 251945466333277 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 (252220344240251) 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, 12629366 + ... + 25767063.

It is an arithmetic number, because the mean of its divisors is an integer number (18270864422640).

Almost surely, 2^{252220344240221} is an apocalyptic number.

It is an amenable number.

252220344240221 is a deficient number, since it is larger than the sum of its proper divisors (40113486522019).

252220344240221 is a wasteful number, since it uses less digits than its factorization.

252220344240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38409724.

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 252220344240221 its reverse (122042443022252), we get a palindrome (374262787262473).

The spelling of 252220344240221 in words is "two hundred fifty-two trillion, two hundred twenty billion, three hundred forty-four million, two hundred forty thousand, two hundred twenty-one".