547147021 has 4 divisors (see below), whose sum is σ = 552459232. Its totient is φ = 541834812.

The previous prime is 547147019. The next prime is 547147033. The reversal of 547147021 is 120741745.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 547147021 - 2¹ = 547147019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (547147001) 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 in 3 ways as a sum of consecutive naturals, for example, 2655951 + ... + 2656156.

It is an arithmetic number, because the mean of its divisors is an integer number (138114808).

Almost surely, 2^547147021 is an apocalyptic number.

It is an amenable number.

547147021 is a deficient number, since it is larger than the sum of its proper divisors (5312211).

547147021 is a wasteful number, since it uses less digits than its factorization.

547147021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312210.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 547147021 is about 23391.1739978993. The cubic root of 547147021 is about 817.9021434501.

Adding to 547147021 its reverse (120741745), we get a palindrome (667888766).

The spelling of 547147021 in words is "five hundred forty-seven million, one hundred forty-seven thousand, twenty-one".