320264557 has 2 divisors, whose sum is σ = 320264558. Its totient is φ = 320264556.

The previous prime is 320264521. The next prime is 320264569. The reversal of 320264557 is 755462023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214153956 + 106110601 = 14634^2 + 10301^2 .

It is a cyclic number.

It is not a de Polignac number, because 320264557 - 2¹⁵ = 320231789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320264597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160132278 + 160132279.

It is an arithmetic number, because the mean of its divisors is an integer number (160132279).

Almost surely, 2^320264557 is an apocalyptic number.

It is an amenable number.

320264557 is a deficient number, since it is larger than the sum of its proper divisors (1).

320264557 is an equidigital number, since it uses as much as digits as its factorization.

320264557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 320264557 is about 17895.9368852262. The cubic root of 320264557 is about 684.1788209603.

The spelling of 320264557 in words is "three hundred twenty million, two hundred sixty-four thousand, five hundred fifty-seven".