555556481 has 4 divisors (see below), whose sum is σ = 588236292. Its totient is φ = 522876672.

The previous prime is 555556471. The next prime is 555556489. The reversal of 555556481 is 184655555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356605456 + 198951025 = 18884^2 + 14105^2 .

It is a cyclic number.

It is not a de Polignac number, because 555556481 - 2¹⁰ = 555555457 is a prime.

It is a super-2 number, since 2×555556481² = 617286007162206722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555556489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16339880 + ... + 16339913.

It is an arithmetic number, because the mean of its divisors is an integer number (147059073).

Almost surely, 2^555556481 is an apocalyptic number.

It is an amenable number.

555556481 is a deficient number, since it is larger than the sum of its proper divisors (32679811).

555556481 is a wasteful number, since it uses less digits than its factorization.

555556481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32679810.

The product of its digits is 600000, while the sum is 44.

The square root of 555556481 is about 23570.2456711847. The cubic root of 555556481 is about 822.0711479117.

The spelling of 555556481 in words is "five hundred fifty-five million, five hundred fifty-six thousand, four hundred eighty-one".