365212221 has 16 divisors (see below), whose sum is σ = 531558720. Its totient is φ = 221198720.

The previous prime is 365212219. The next prime is 365212223. The reversal of 365212221 is 122212563.

It is an interprime number because it is at equal distance from previous prime (365212219) and next prime (365212223).

It is a cyclic number.

It is not a de Polignac number, because 365212221 - 2¹ = 365212219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 365212191 and 365212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365212223) 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, 73801 + ... + 78593.

It is an arithmetic number, because the mean of its divisors is an integer number (33222420).

Almost surely, 2^365212221 is an apocalyptic number.

It is an amenable number.

365212221 is a deficient number, since it is larger than the sum of its proper divisors (166346499).

365212221 is a wasteful number, since it uses less digits than its factorization.

365212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116.

The product of its digits is 1440, while the sum is 24.

The square root of 365212221 is about 19110.5264448680. The cubic root of 365212221 is about 714.7954300897.

Adding to 365212221 its reverse (122212563), we get a palindrome (487424784).

The spelling of 365212221 in words is "three hundred sixty-five million, two hundred twelve thousand, two hundred twenty-one".