537818081 has 4 divisors (see below), whose sum is σ = 537885972. Its totient is φ = 537750192.

The previous prime is 537818027. The next prime is 537818087. The reversal of 537818081 is 180818735.

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 339149056 + 198669025 = 18416^2 + 14095^2 .

It is a cyclic number.

It is not a de Polignac number, because 537818081 - 2¹⁰ = 537817057 is a prime.

It is a super-2 number, since 2×537818081² = 578496576501045122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537818087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20210 + ... + 38523.

It is an arithmetic number, because the mean of its divisors is an integer number (134471493).

Almost surely, 2^537818081 is an apocalyptic number.

It is an amenable number.

537818081 is a deficient number, since it is larger than the sum of its proper divisors (67891).

537818081 is an equidigital number, since it uses as much as digits as its factorization.

537818081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67890.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 537818081 is about 23190.9051354189. The cubic root of 537818081 is about 813.2270193648.

The spelling of 537818081 in words is "five hundred thirty-seven million, eight hundred eighteen thousand, eighty-one".