521440014641331 has 16 divisors (see below), whose sum is σ = 697768062915744. Its totient is φ = 346369338557184.

The previous prime is 521440014641239. The next prime is 521440014641333. The reversal of 521440014641331 is 133146410044125.

It is not a de Polignac number, because 521440014641331 - 2⁹ = 521440014640819 is a prime.

It is a super-2 number, since 2×521440014641331² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521440014641331.

It is not an unprimeable number, because it can be changed into a prime (521440014641333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123941311 + ... + 128079383.

It is an arithmetic number, because the mean of its divisors is an integer number (43610503932234).

Almost surely, 2^{521440014641331} is an apocalyptic number.

521440014641331 is a deficient number, since it is larger than the sum of its proper divisors (176328048274413).

521440014641331 is a wasteful number, since it uses less digits than its factorization.

521440014641331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289990.

The product of its (nonzero) digits is 138240, while the sum is 39.

Adding to 521440014641331 its reverse (133146410044125), we get a palindrome (654586424685456).

The spelling of 521440014641331 in words is "five hundred twenty-one trillion, four hundred forty billion, fourteen million, six hundred forty-one thousand, three hundred thirty-one".