655402213 has 2 divisors, whose sum is σ = 655402214. Its totient is φ = 655402212.

The previous prime is 655402199. The next prime is 655402243. The reversal of 655402213 is 312204556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328588129 + 326814084 = 18127^2 + 18078^2 .

It is a cyclic number.

It is not a de Polignac number, because 655402213 - 2⁹ = 655401701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655402243) 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 as a sum of consecutive naturals, namely, 327701106 + 327701107.

It is an arithmetic number, because the mean of its divisors is an integer number (327701107).

Almost surely, 2^655402213 is an apocalyptic number.

It is an amenable number.

655402213 is a deficient number, since it is larger than the sum of its proper divisors (1).

655402213 is an equidigital number, since it uses as much as digits as its factorization.

655402213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 655402213 is about 25600.8244593802. The cubic root of 655402213 is about 868.6322866025.

Adding to 655402213 its reverse (312204556), we get a palindrome (967606769).

The spelling of 655402213 in words is "six hundred fifty-five million, four hundred two thousand, two hundred thirteen".