521131152005 has 8 divisors (see below), whose sum is σ = 626377544952. Its totient is φ = 416224813248.

The previous prime is 521131152001. The next prime is 521131152037. The reversal of 521131152005 is 500251131125.

It can be written as a sum of positive squares in 4 ways, for example, as 4042162084 + 517088989921 = 63578^2 + 719089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521131152005 - 2² = 521131152001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85010174 + ... + 85016303.

It is an arithmetic number, because the mean of its divisors is an integer number (78297193119).

Almost surely, 2^521131152005 is an apocalyptic number.

It is an amenable number.

521131152005 is a deficient number, since it is larger than the sum of its proper divisors (105246392947).

521131152005 is a wasteful number, since it uses less digits than its factorization.

521131152005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170027095.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 521131152005 in words is "five hundred twenty-one billion, one hundred thirty-one million, one hundred fifty-two thousand, five".