405220361 has 16 divisors (see below), whose sum is σ = 499715328. Its totient is φ = 319982400.

The previous prime is 405220339. The next prime is 405220363. The reversal of 405220361 is 163022504.

It is a cyclic number.

It is not a de Polignac number, because 405220361 - 2¹⁰ = 405219337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405220363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45116 + ... + 53346.

It is an arithmetic number, because the mean of its divisors is an integer number (31232208).

Almost surely, 2^405220361 is an apocalyptic number.

It is an amenable number.

405220361 is a deficient number, since it is larger than the sum of its proper divisors (94494967).

405220361 is a wasteful number, since it uses less digits than its factorization.

405220361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 405220361 is about 20130.0859660360. The cubic root of 405220361 is about 739.9977848728.

Adding to 405220361 its reverse (163022504), we get a palindrome (568242865).

The spelling of 405220361 in words is "four hundred five million, two hundred twenty thousand, three hundred sixty-one".