506072209 has 2 divisors, whose sum is σ = 506072210. Its totient is φ = 506072208.

The previous prime is 506072153. The next prime is 506072213. The reversal of 506072209 is 902270605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492174225 + 13897984 = 22185^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 506072209 - 2¹⁵ = 506039441 is a prime.

It is a super-2 number, since 2×506072209² = 512218161444279362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (506072219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253036104 + 253036105.

It is an arithmetic number, because the mean of its divisors is an integer number (253036105).

Almost surely, 2^506072209 is an apocalyptic number.

It is an amenable number.

506072209 is a deficient number, since it is larger than the sum of its proper divisors (1).

506072209 is an equidigital number, since it uses as much as digits as its factorization.

506072209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 506072209 is about 22496.0487419458. The cubic root of 506072209 is about 796.9006166395.

The spelling of 506072209 in words is "five hundred six million, seventy-two thousand, two hundred nine".