252022221 has 12 divisors (see below), whose sum is σ = 397126080. Its totient is φ = 152740680.

The previous prime is 252022193. The next prime is 252022223. The reversal of 252022221 is 122220252.

It is not a de Polignac number, because 252022221 - 2¹⁴ = 252005837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252022194 and 252022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252022223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1272741 + ... + 1272938.

It is an arithmetic number, because the mean of its divisors is an integer number (33093840).

Almost surely, 2^252022221 is an apocalyptic number.

It is an amenable number.

252022221 is a deficient number, since it is larger than the sum of its proper divisors (145103859).

252022221 is a wasteful number, since it uses less digits than its factorization.

252022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545696 (or 2545693 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 252022221 is about 15875.2077466722. The cubic root of 252022221 is about 631.6545248055.

Adding to 252022221 its reverse (122220252), we get a palindrome (374242473).

The spelling of 252022221 in words is "two hundred fifty-two million, twenty-two thousand, two hundred twenty-one".