511330247 has 2 divisors, whose sum is σ = 511330248. Its totient is φ = 511330246.

The previous prime is 511330241. The next prime is 511330271. The reversal of 511330247 is 742033115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511330247 - 2⁴ = 511330231 is a prime.

It is a super-2 number, since 2×511330247² = 522917242994162018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511330241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255665123 + 255665124.

It is an arithmetic number, because the mean of its divisors is an integer number (255665124).

Almost surely, 2^511330247 is an apocalyptic number.

511330247 is a deficient number, since it is larger than the sum of its proper divisors (1).

511330247 is an equidigital number, since it uses as much as digits as its factorization.

511330247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 511330247 is about 22612.6125646728. The cubic root of 511330247 is about 799.6510180992.

The spelling of 511330247 in words is "five hundred eleven million, three hundred thirty thousand, two hundred forty-seven".