546455821 has 4 divisors (see below), whose sum is σ = 546682492. Its totient is φ = 546229152.

The previous prime is 546455813. The next prime is 546455839. The reversal of 546455821 is 128554645.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 271260900 + 275194921 = 16470^2 + 16589^2 .

It is a cyclic number.

It is not a de Polignac number, because 546455821 - 2³ = 546455813 is a prime.

It is a super-2 number, since 2×546455821² = 597227928609568082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (546455801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109680 + ... + 114553.

It is an arithmetic number, because the mean of its divisors is an integer number (136670623).

Almost surely, 2^546455821 is an apocalyptic number.

It is an amenable number.

546455821 is a deficient number, since it is larger than the sum of its proper divisors (226671).

546455821 is a wasteful number, since it uses less digits than its factorization.

546455821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226670.

The product of its digits is 192000, while the sum is 40.

The square root of 546455821 is about 23376.3945252470. The cubic root of 546455821 is about 817.5575851227.

The spelling of 546455821 in words is "five hundred forty-six million, four hundred fifty-five thousand, eight hundred twenty-one".