555011231 has 2 divisors, whose sum is σ = 555011232. Its totient is φ = 555011230.

The previous prime is 555011227. The next prime is 555011239. The reversal of 555011231 is 132110555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555011231 - 2² = 555011227 is a prime.

It is a super-2 number, since 2×555011231² = 616074933072270722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 555011197 and 555011206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555011239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277505615 + 277505616.

It is an arithmetic number, because the mean of its divisors is an integer number (277505616).

Almost surely, 2^555011231 is an apocalyptic number.

555011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

555011231 is an equidigital number, since it uses as much as digits as its factorization.

555011231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 555011231 is about 23558.6763422736. The cubic root of 555011231 is about 821.8021197520.

Adding to 555011231 its reverse (132110555), we get a palindrome (687121786).

The spelling of 555011231 in words is "five hundred fifty-five million, eleven thousand, two hundred thirty-one".