521270103439 has 4 divisors (see below), whose sum is σ = 521426691360. Its totient is φ = 521113515520.

The previous prime is 521270103421. The next prime is 521270103449. The reversal of 521270103439 is 934301072125.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521270103439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521270103398 and 521270103407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521270103449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78288967 + ... + 78295624.

It is an arithmetic number, because the mean of its divisors is an integer number (130356672840).

Almost surely, 2^521270103439 is an apocalyptic number.

521270103439 is a deficient number, since it is larger than the sum of its proper divisors (156587921).

521270103439 is a wasteful number, since it uses less digits than its factorization.

521270103439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156587920.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 521270103439 in words is "five hundred twenty-one billion, two hundred seventy million, one hundred three thousand, four hundred thirty-nine".