655022213 has 4 divisors (see below), whose sum is σ = 656455980. Its totient is φ = 653588448.

The previous prime is 655022197. The next prime is 655022233. The reversal of 655022213 is 312220556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 294705889 + 360316324 = 17167^2 + 18982^2 .

It is a cyclic number.

It is not a de Polignac number, because 655022213 - 2⁴ = 655022197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655022233) 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 3 ways as a sum of consecutive naturals, for example, 716198 + ... + 717111.

It is an arithmetic number, because the mean of its divisors is an integer number (164113995).

Almost surely, 2^655022213 is an apocalyptic number.

It is an amenable number.

655022213 is a deficient number, since it is larger than the sum of its proper divisors (1433767).

655022213 is a wasteful number, since it uses less digits than its factorization.

655022213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433766.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 655022213 is about 25593.4017473254. The cubic root of 655022213 is about 868.4643774539.

Adding to 655022213 its reverse (312220556), we get a palindrome (967242769).

The spelling of 655022213 in words is "six hundred fifty-five million, twenty-two thousand, two hundred thirteen".