521844131 has 2 divisors, whose sum is σ = 521844132. Its totient is φ = 521844130.

The previous prime is 521844119. The next prime is 521844161. The reversal of 521844131 is 131448125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521844131 - 2²² = 517649827 is a prime.

It is a super-2 number, since 2×521844131² = 544642594118290322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 521844094 and 521844103.

It is not a weakly prime, because it can be changed into another prime (521844161) 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 as a sum of consecutive naturals, namely, 260922065 + 260922066.

It is an arithmetic number, because the mean of its divisors is an integer number (260922066).

Almost surely, 2^521844131 is an apocalyptic number.

521844131 is a deficient number, since it is larger than the sum of its proper divisors (1).

521844131 is an equidigital number, since it uses as much as digits as its factorization.

521844131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 29.

The square root of 521844131 is about 22843.9079625181. The cubic root of 521844131 is about 805.0946385141.

The spelling of 521844131 in words is "five hundred twenty-one million, eight hundred forty-four thousand, one hundred thirty-one".