555000401 has 4 divisors (see below), whose sum is σ = 555120804. Its totient is φ = 554880000.

The previous prime is 555000389. The next prime is 555000403. The reversal of 555000401 is 104000555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104000555 = 5 ⋅20800111.

It can be written as a sum of positive squares in 2 ways, for example, as 487349776 + 67650625 = 22076^2 + 8225^2 .

It is a cyclic number.

It is not a de Polignac number, because 555000401 - 2¹⁰ = 554999377 is a prime.

It is a super-2 number, since 2×555000401² = 616050890220321602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (555000403) 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, 53000 + ... + 62601.

It is an arithmetic number, because the mean of its divisors is an integer number (138780201).

Almost surely, 2^555000401 is an apocalyptic number.

It is an amenable number.

555000401 is a deficient number, since it is larger than the sum of its proper divisors (120403).

555000401 is a wasteful number, since it uses less digits than its factorization.

555000401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120402.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 555000401 is about 23558.4464895290. The cubic root of 555000401 is about 821.7967744098.

Adding to 555000401 its reverse (104000555), we get a palindrome (659000956).

The spelling of 555000401 in words is "five hundred fifty-five million, four hundred one", and thus it is an aban number.