521231063 has 2 divisors, whose sum is σ = 521231064. Its totient is φ = 521231062.

The previous prime is 521231059. The next prime is 521231107. The reversal of 521231063 is 360132125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521231063 - 2² = 521231059 is a prime.

It is a super-2 number, since 2×521231063² = 543363642072219938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521231563) 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, 260615531 + 260615532.

It is an arithmetic number, because the mean of its divisors is an integer number (260615532).

Almost surely, 2^521231063 is an apocalyptic number.

521231063 is a deficient number, since it is larger than the sum of its proper divisors (1).

521231063 is an equidigital number, since it uses as much as digits as its factorization.

521231063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 521231063 is about 22830.4853868681. The cubic root of 521231063 is about 804.7792370730.

Adding to 521231063 its reverse (360132125), we get a palindrome (881363188).

The spelling of 521231063 in words is "five hundred twenty-one million, two hundred thirty-one thousand, sixty-three".