547265821 has 2 divisors, whose sum is σ = 547265822. Its totient is φ = 547265820.

The previous prime is 547265777. The next prime is 547265843. The reversal of 547265821 is 128562745.

547265821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526197721 + 21068100 = 22939^2 + 4590^2 .

It is a cyclic number.

It is not a de Polignac number, because 547265821 - 2¹³ = 547257629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (547265881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273632910 + 273632911.

It is an arithmetic number, because the mean of its divisors is an integer number (273632911).

Almost surely, 2^547265821 is an apocalyptic number.

It is an amenable number.

547265821 is a deficient number, since it is larger than the sum of its proper divisors (1).

547265821 is an equidigital number, since it uses as much as digits as its factorization.

547265821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 40.

The square root of 547265821 is about 23393.7132794262. The cubic root of 547265821 is about 817.9613351842.

The spelling of 547265821 in words is "five hundred forty-seven million, two hundred sixty-five thousand, eight hundred twenty-one".