555211231 has 2 divisors, whose sum is σ = 555211232. Its totient is φ = 555211230.

The previous prime is 555211201. The next prime is 555211277. The reversal of 555211231 is 132112555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555211231 - 2¹¹ = 555209183 is a prime.

It is a super-2 number, since 2×555211231² = 616519022057070722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 555211196 and 555211205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277605615 + 277605616.

It is an arithmetic number, because the mean of its divisors is an integer number (277605616).

Almost surely, 2^555211231 is an apocalyptic number.

555211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

555211231 is an equidigital number, since it uses as much as digits as its factorization.

555211231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500, while the sum is 25.

The square root of 555211231 is about 23562.9206805948. The cubic root of 555211231 is about 821.9008208690.

Adding to 555211231 its reverse (132112555), we get a palindrome (687323786).

The spelling of 555211231 in words is "five hundred fifty-five million, two hundred eleven thousand, two hundred thirty-one".