521275938972 has 48 divisors (see below), whose sum is σ = 1247245316352. Its totient is φ = 169348021120.

The previous prime is 521275938947. The next prime is 521275938977. The reversal of 521275938972 is 279839572125.

It is a super-3 number, since 3×521275938972³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521275938977) 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 15 ways as a sum of consecutive naturals, for example, 55278 + ... + 1022549.

It is an arithmetic number, because the mean of its divisors is an integer number (25984277424).

Almost surely, 2^521275938972 is an apocalyptic number.

It is an amenable number.

521275938972 is an abundant number, since it is smaller than the sum of its proper divisors (725969377380).

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

521275938972 is a wasteful number, since it uses less digits than its factorization.

521275938972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078858 (or 1078856 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 60.

The spelling of 521275938972 in words is "five hundred twenty-one billion, two hundred seventy-five million, nine hundred thirty-eight thousand, nine hundred seventy-two".