521401631132 has 12 divisors (see below), whose sum is σ = 912518141640. Its totient is φ = 260682162096.

The previous prime is 521401631117. The next prime is 521401631183. The reversal of 521401631132 is 231136104125.

It is a super-2 number, since 2×521401631132² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521401631095 and 521401631104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4600382 + ... + 4712357.

It is an arithmetic number, because the mean of its divisors is an integer number (76043178470).

Almost surely, 2^521401631132 is an apocalyptic number.

It is an amenable number.

521401631132 is a deficient number, since it is larger than the sum of its proper divisors (391116510508).

521401631132 is a wasteful number, since it uses less digits than its factorization.

521401631132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326740 (or 9326738 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 521401631132 its reverse (231136104125), we get a palindrome (752537735257).

The spelling of 521401631132 in words is "five hundred twenty-one billion, four hundred one million, six hundred thirty-one thousand, one hundred thirty-two".