521506130348 has 48 divisors (see below), whose sum is σ = 1100998248000. Its totient is φ = 215795623680.

The previous prime is 521506130347. The next prime is 521506130371. The reversal of 521506130348 is 843031605125.

It is a happy number.

It is a super-2 number, since 2×521506130348² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521506130347) 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 in 15 ways as a sum of consecutive naturals, for example, 6513773 + ... + 6593348.

It is an arithmetic number, because the mean of its divisors is an integer number (22937463500).

Almost surely, 2^521506130348 is an apocalyptic number.

521506130348 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

521506130348 is an abundant number, since it is smaller than the sum of its proper divisors (579492117652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521506130348 is a wasteful number, since it uses less digits than its factorization.

521506130348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13107175 (or 13107159 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 521506130348 in words is "five hundred twenty-one billion, five hundred six million, one hundred thirty thousand, three hundred forty-eight".