252443215221 has 16 divisors (see below), whose sum is σ = 346896506880. Its totient is φ = 163199015280.

The previous prime is 252443215207. The next prime is 252443215229. The reversal of 252443215221 is 122512344252.

It is not a de Polignac number, because 252443215221 - 2⁷ = 252443215093 is a prime.

It is a super-2 number, since 2×252443215221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252443215229) 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, 7021365 + ... + 7057226.

It is an arithmetic number, because the mean of its divisors is an integer number (21681031680).

Almost surely, 2^252443215221 is an apocalyptic number.

It is an amenable number.

252443215221 is a deficient number, since it is larger than the sum of its proper divisors (94453291659).

252443215221 is a wasteful number, since it uses less digits than its factorization.

252443215221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14078776.

The product of its digits is 38400, while the sum is 33.

Adding to 252443215221 its reverse (122512344252), we get a palindrome (374955559473).

The spelling of 252443215221 in words is "two hundred fifty-two billion, four hundred forty-three million, two hundred fifteen thousand, two hundred twenty-one".