521131152004 has 24 divisors (see below), whose sum is σ = 914236323840. Its totient is φ = 259921195776.

The previous prime is 521131152001. The next prime is 521131152037. The reversal of 521131152004 is 400251131125.

It is a self number, because there is not a number n which added to its sum of digits gives 521131152004.

It is not an unprimeable number, because it can be changed into a prime (521131152001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5039629 + ... + 5141995.

It is an arithmetic number, because the mean of its divisors is an integer number (38093180160).

Almost surely, 2^521131152004 is an apocalyptic number.

It is an amenable number.

521131152004 is a deficient number, since it is larger than the sum of its proper divisors (393105171836).

521131152004 is a wasteful number, since it uses less digits than its factorization.

521131152004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105507 (or 105505 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 521131152004 its reverse (400251131125), we get a palindrome (921382283129).

The spelling of 521131152004 in words is "five hundred twenty-one billion, one hundred thirty-one million, one hundred fifty-two thousand, four".