555505231 has 2 divisors, whose sum is σ = 555505232. Its totient is φ = 555505230.

The previous prime is 555505229. The next prime is 555505283. The reversal of 555505231 is 132505555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555505231 - 2¹ = 555505229 is a prime.

It is a super-2 number, since 2×555505231² = 617172123336726722, which contains 22 as substring.

Together with 555505229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 555505193 and 555505202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555505211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277752615 + 277752616.

It is an arithmetic number, because the mean of its divisors is an integer number (277752616).

Almost surely, 2^555505231 is an apocalyptic number.

555505231 is a deficient number, since it is larger than the sum of its proper divisors (1).

555505231 is an equidigital number, since it uses as much as digits as its factorization.

555505231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 555505231 is about 23569.1584703400. The cubic root of 555505231 is about 822.0458684886.

The spelling of 555505231 in words is "five hundred fifty-five million, five hundred five thousand, two hundred thirty-one".