557521730 has 8 divisors (see below), whose sum is σ = 1003539132. Its totient is φ = 223008688.

The previous prime is 557521709. The next prime is 557521733. The reversal of 557521730 is 37125755.

It can be written as a sum of positive squares in 2 ways, for example, as 541353289 + 16168441 = 23267^2 + 4021^2 .

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

It is not an unprimeable number, because it can be changed into a prime (557521733) 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, 27876077 + ... + 27876096.

Almost surely, 2^557521730 is an apocalyptic number.

557521730 is a deficient number, since it is larger than the sum of its proper divisors (446017402).

557521730 is a wasteful number, since it uses less digits than its factorization.

557521730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55752180.

The product of its (nonzero) digits is 36750, while the sum is 35.

The square root of 557521730 is about 23611.8980600883. The cubic root of 557521730 is about 823.0393502403.

The spelling of 557521730 in words is "five hundred fifty-seven million, five hundred twenty-one thousand, seven hundred thirty".