355221133 has 2 divisors, whose sum is σ = 355221134. Its totient is φ = 355221132.

The previous prime is 355221121. The next prime is 355221143. The reversal of 355221133 is 331122553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344547844 + 10673289 = 18562^2 + 3267^2 .

It is a cyclic number.

It is not a de Polignac number, because 355221133 - 2⁵ = 355221101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 355221098 and 355221107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355221143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177610566 + 177610567.

It is an arithmetic number, because the mean of its divisors is an integer number (177610567).

Almost surely, 2^355221133 is an apocalyptic number.

It is an amenable number.

355221133 is a deficient number, since it is larger than the sum of its proper divisors (1).

355221133 is an equidigital number, since it uses as much as digits as its factorization.

355221133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 355221133 is about 18847.3110283669. The cubic root of 355221133 is about 708.2168658275.

Adding to 355221133 its reverse (331122553), we get a palindrome (686343686).

The spelling of 355221133 in words is "three hundred fifty-five million, two hundred twenty-one thousand, one hundred thirty-three".