506972281 has 4 divisors (see below), whose sum is σ = 515283364. Its totient is φ = 498661200.

The previous prime is 506972251. The next prime is 506972321. The reversal of 506972281 is 182279605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182279605 = 5 ⋅36455921.

It can be written as a sum of positive squares in 2 ways, for example, as 16128256 + 490844025 = 4016^2 + 22155^2 .

It is a cyclic number.

It is not a de Polignac number, because 506972281 - 2⁷ = 506972153 is a prime.

It is a super-2 number, since 2×506972281² = 514041787404685922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506972251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155450 + ... + 4155571.

It is an arithmetic number, because the mean of its divisors is an integer number (128820841).

Almost surely, 2^506972281 is an apocalyptic number.

It is an amenable number.

506972281 is a deficient number, since it is larger than the sum of its proper divisors (8311083).

506972281 is an equidigital number, since it uses as much as digits as its factorization.

506972281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8311082.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 506972281 is about 22516.0449679778. The cubic root of 506972281 is about 797.3727779291.

The spelling of 506972281 in words is "five hundred six million, nine hundred seventy-two thousand, two hundred eighty-one".