521310314263 has 4 divisors (see below), whose sum is σ = 521824935528. Its totient is φ = 520795693000.

The previous prime is 521310314191. The next prime is 521310314267. The reversal of 521310314263 is 362413013125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521310314263 - 2⁹ = 521310313751 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521310314267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257309113 + ... + 257311138.

It is an arithmetic number, because the mean of its divisors is an integer number (130456233882).

Almost surely, 2^521310314263 is an apocalyptic number.

521310314263 is a deficient number, since it is larger than the sum of its proper divisors (514621265).

521310314263 is a wasteful number, since it uses less digits than its factorization.

521310314263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514621264.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 521310314263 its reverse (362413013125), we get a palindrome (883723327388).

The spelling of 521310314263 in words is "five hundred twenty-one billion, three hundred ten million, three hundred fourteen thousand, two hundred sixty-three".