557248021 has 8 divisors (see below), whose sum is σ = 628869600. Its totient is φ = 489120240.

The previous prime is 557248019. The next prime is 557248031. The reversal of 557248021 is 120842755.

It is a happy number.

557248021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 557248021 - 2¹ = 557248019 is a prime.

It is a super-3 number, since 3×557248021³ (a number of 27 digits) contains 333 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 (557248001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873111 + ... + 873748.

It is an arithmetic number, because the mean of its divisors is an integer number (78608700).

Almost surely, 2^557248021 is an apocalyptic number.

It is an amenable number.

557248021 is a deficient number, since it is larger than the sum of its proper divisors (71621579).

557248021 is a wasteful number, since it uses less digits than its factorization.

557248021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746899.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 557248021 is about 23606.1013511338. The cubic root of 557248021 is about 822.9046409004.

The spelling of 557248021 in words is "five hundred fifty-seven million, two hundred forty-eight thousand, twenty-one".