52431512521 has 4 divisors (see below), whose sum is σ = 52432509844. Its totient is φ = 52430515200.

The previous prime is 52431512473. The next prime is 52431512569. The reversal of 52431512521 is 12521513425.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (52431512473) and next prime (52431512569).

It can be written as a sum of positive squares in 2 ways, for example, as 14211262521 + 38220250000 = 119211^2 + 195500^2 .

It is a cyclic number.

It is not a de Polignac number, because 52431512521 - 2⁹ = 52431512009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52431516521) 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 3 ways as a sum of consecutive naturals, for example, 415140 + ... + 526501.

It is an arithmetic number, because the mean of its divisors is an integer number (13108127461).

Almost surely, 2^52431512521 is an apocalyptic number.

It is an amenable number.

52431512521 is a deficient number, since it is larger than the sum of its proper divisors (997323).

52431512521 is an equidigital number, since it uses as much as digits as its factorization.

52431512521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997322.

The product of its digits is 12000, while the sum is 31.

The spelling of 52431512521 in words is "fifty-two billion, four hundred thirty-one million, five hundred twelve thousand, five hundred twenty-one".