365340221 has 4 divisors (see below), whose sum is σ = 365752992. Its totient is φ = 364927452.

The previous prime is 365340203. The next prime is 365340223. The reversal of 365340221 is 122043563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-365340221 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 (365340223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205055 + ... + 206828.

It is an arithmetic number, because the mean of its divisors is an integer number (91438248).

Almost surely, 2^365340221 is an apocalyptic number.

It is an amenable number.

365340221 is a deficient number, since it is larger than the sum of its proper divisors (412771).

365340221 is an equidigital number, since it uses as much as digits as its factorization.

365340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412770.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 365340221 is about 19113.8750911478. The cubic root of 365340221 is about 714.8789277776.

Adding to 365340221 its reverse (122043563), we get a palindrome (487383784).

The spelling of 365340221 in words is "three hundred sixty-five million, three hundred forty thousand, two hundred twenty-one".