555781313 has 2 divisors, whose sum is σ = 555781314. Its totient is φ = 555781312.

The previous prime is 555781307. The next prime is 555781327. The reversal of 555781313 is 313187555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555639184 + 142129 = 23572^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 555781313 - 2⁴ = 555781297 is a prime.

It is not a weakly prime, because it can be changed into another prime (555781393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277890656 + 277890657.

It is an arithmetic number, because the mean of its divisors is an integer number (277890657).

Almost surely, 2^555781313 is an apocalyptic number.

It is an amenable number.

555781313 is a deficient number, since it is larger than the sum of its proper divisors (1).

555781313 is an equidigital number, since it uses as much as digits as its factorization.

555781313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 38.

The square root of 555781313 is about 23575.0145917240. The cubic root of 555781313 is about 822.1820295107.

The spelling of 555781313 in words is "five hundred fifty-five million, seven hundred eighty-one thousand, three hundred thirteen".