557473721 has 8 divisors (see below), whose sum is σ = 650668800. Its totient is φ = 467667648.

The previous prime is 557473711. The next prime is 557473723. The reversal of 557473721 is 127374755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 557473721 - 2¹⁰ = 557472697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557473723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846896 + ... + 847553.

It is an arithmetic number, because the mean of its divisors is an integer number (81333600).

Almost surely, 2^557473721 is an apocalyptic number.

It is an amenable number.

557473721 is a deficient number, since it is larger than the sum of its proper divisors (93195079).

557473721 is a wasteful number, since it uses less digits than its factorization.

557473721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694503.

The product of its digits is 205800, while the sum is 41.

The square root of 557473721 is about 23610.8814109088. The cubic root of 557473721 is about 823.0157251938.

The spelling of 557473721 in words is "five hundred fifty-seven million, four hundred seventy-three thousand, seven hundred twenty-one".