557288421 has 8 divisors (see below), whose sum is σ = 749996064. Its totient is φ = 368053200.

The previous prime is 557288419. The next prime is 557288429. The reversal of 557288421 is 124882755.

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

It is not a de Polignac number, because 557288421 - 2¹ = 557288419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557288429) 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, 867730 + ... + 868371.

It is an arithmetic number, because the mean of its divisors is an integer number (93749508).

Almost surely, 2^557288421 is an apocalyptic number.

It is an amenable number.

557288421 is a deficient number, since it is larger than the sum of its proper divisors (192707643).

557288421 is a wasteful number, since it uses less digits than its factorization.

557288421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736211.

The product of its digits is 179200, while the sum is 42.

The square root of 557288421 is about 23606.9570465996. The cubic root of 557288421 is about 822.9245270450.

The spelling of 557288421 in words is "five hundred fifty-seven million, two hundred eighty-eight thousand, four hundred twenty-one".