366525221 has 2 divisors, whose sum is σ = 366525222. Its totient is φ = 366525220.

The previous prime is 366525209. The next prime is 366525241. The reversal of 366525221 is 122525663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366148225 + 376996 = 19135^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 366525221 - 2¹⁸ = 366263077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_19642370 and since 366525221 and 19642370 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366525241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183262610 + 183262611.

It is an arithmetic number, because the mean of its divisors is an integer number (183262611).

Almost surely, 2^366525221 is an apocalyptic number.

It is an amenable number.

366525221 is a deficient number, since it is larger than the sum of its proper divisors (1).

366525221 is an equidigital number, since it uses as much as digits as its factorization.

366525221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 366525221 is about 19144.8484193529. The cubic root of 366525221 is about 715.6510092719.

The spelling of 366525221 in words is "three hundred sixty-six million, five hundred twenty-five thousand, two hundred twenty-one".