550672261 has 2 divisors, whose sum is σ = 550672262. Its totient is φ = 550672260.

The previous prime is 550672249. The next prime is 550672289. The reversal of 550672261 is 162276055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296907361 + 253764900 = 17231^2 + 15930^2 .

It is a cyclic number.

It is not a de Polignac number, because 550672261 - 2⁵ = 550672229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550676261) 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, 275336130 + 275336131.

It is an arithmetic number, because the mean of its divisors is an integer number (275336131).

Almost surely, 2^550672261 is an apocalyptic number.

It is an amenable number.

550672261 is a deficient number, since it is larger than the sum of its proper divisors (1).

550672261 is an equidigital number, since it uses as much as digits as its factorization.

550672261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 550672261 is about 23466.4070747952. The cubic root of 550672261 is about 819.6549514958.

It can be divided in two parts, 5 and 50672261, that multiplied together give a triangular number (253361305 = T₂₂₅₁₀).

The spelling of 550672261 in words is "five hundred fifty million, six hundred seventy-two thousand, two hundred sixty-one".