555501 has 4 divisors (see below), whose sum is σ = 740672. Its totient is φ = 370332.

The previous prime is 555491. The next prime is 555521. The reversal of 555501 is 105555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 555501 - 2¹⁷ = 424429 is a prime.

It is a super-2 number, since 2×555501² = 617162722002, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555521) 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, 92581 + ... + 92586.

It is an arithmetic number, because the mean of its divisors is an integer number (185168).

2⁵⁵⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

555501 is a deficient number, since it is larger than the sum of its proper divisors (185171).

555501 is a wasteful number, since it uses less digits than its factorization.

555501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185170.

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 555501 is about 745.3193946222. The cubic root of 555501 is about 82.2043781449.

The spelling of 555501 in words is "five hundred fifty-five thousand, five hundred one".