555500401 has 4 divisors (see below), whose sum is σ = 555600112. Its totient is φ = 555400692.

The previous prime is 555500371. The next prime is 555500443. The reversal of 555500401 is 104005555.

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 a cyclic number.

It is not a de Polignac number, because 555500401 - 2²⁹ = 18629489 is a prime.

It is a super-2 number, since 2×555500401² = 617161391022321602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555500471) 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, 40971 + ... + 52816.

It is an arithmetic number, because the mean of its divisors is an integer number (138900028).

Almost surely, 2^555500401 is an apocalyptic number.

It is an amenable number.

555500401 is a deficient number, since it is larger than the sum of its proper divisors (99711).

555500401 is an equidigital number, since it uses as much as digits as its factorization.

555500401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99710.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 555500401 is about 23569.0560057037. The cubic root of 555500401 is about 822.0434859770.

Adding to 555500401 its reverse (104005555), we get a palindrome (659505956).

The spelling of 555500401 in words is "five hundred fifty-five million, five hundred thousand, four hundred one".