356233221 has 10 divisors (see below), whose sum is σ = 532150982. Its totient is φ = 237488760.

The previous prime is 356233219. The next prime is 356233247. The reversal of 356233221 is 122332653.

356233221 is a `hidden beast` number, since 3 + 5 + 623 + 32 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 347412321 + 8820900 = 18639^2 + 2970^2 .

It is not a de Polignac number, because 356233221 - 2¹ = 356233219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356233201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2198890 + ... + 2199051.

Almost surely, 2^356233221 is an apocalyptic number.

It is an amenable number.

356233221 is a deficient number, since it is larger than the sum of its proper divisors (175917761).

356233221 is an equidigital number, since it uses as much as digits as its factorization.

356233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397953 (or 4397944 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 356233221 is about 18874.1415963747. The cubic root of 356233221 is about 708.8888398533. Note that the first 4 decimals are identical.

Adding to 356233221 its reverse (122332653), we get a palindrome (478565874).

The spelling of 356233221 in words is "three hundred fifty-six million, two hundred thirty-three thousand, two hundred twenty-one".