505550231 has 2 divisors, whose sum is σ = 505550232. Its totient is φ = 505550230.

The previous prime is 505550219. The next prime is 505550239. The reversal of 505550231 is 132055505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505550231 - 2⁶ = 505550167 is a prime.

It is a super-2 number, since 2×505550231² = 511162072128306722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505550231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505550239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252775115 + 252775116.

It is an arithmetic number, because the mean of its divisors is an integer number (252775116).

Almost surely, 2^505550231 is an apocalyptic number.

505550231 is a deficient number, since it is larger than the sum of its proper divisors (1).

505550231 is an equidigital number, since it uses as much as digits as its factorization.

505550231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 505550231 is about 22484.4442003800. Note that the first 3 decimals coincide. The cubic root of 505550231 is about 796.6265400174.

The spelling of 505550231 in words is "five hundred five million, five hundred fifty thousand, two hundred thirty-one".