537129521 has 4 divisors (see below), whose sum is σ = 537206052. Its totient is φ = 537052992.

The previous prime is 537129517. The next prime is 537129577. The reversal of 537129521 is 125921735.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69488896 + 467640625 = 8336^2 + 21625^2 .

It is a cyclic number.

It is not a de Polignac number, because 537129521 - 2² = 537129517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537129581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26540 + ... + 42173.

It is an arithmetic number, because the mean of its divisors is an integer number (134301513).

Almost surely, 2^537129521 is an apocalyptic number.

It is an amenable number.

537129521 is a deficient number, since it is larger than the sum of its proper divisors (76531).

537129521 is an equidigital number, since it uses as much as digits as its factorization.

537129521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76530.

The product of its digits is 18900, while the sum is 35.

The square root of 537129521 is about 23176.0549058721. The cubic root of 537129521 is about 812.8798172446.

The spelling of 537129521 in words is "five hundred thirty-seven million, one hundred twenty-nine thousand, five hundred twenty-one".