535205681 has 2 divisors, whose sum is σ = 535205682. Its totient is φ = 535205680.

The previous prime is 535205659. The next prime is 535205711. The reversal of 535205681 is 186502535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346555456 + 188650225 = 18616^2 + 13735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-535205681 is a prime.

It is a super-2 number, since 2×535205681² = 572890241949347522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (535205641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267602840 + 267602841.

It is an arithmetic number, because the mean of its divisors is an integer number (267602841).

Almost surely, 2^535205681 is an apocalyptic number.

It is an amenable number.

535205681 is a deficient number, since it is larger than the sum of its proper divisors (1).

535205681 is an equidigital number, since it uses as much as digits as its factorization.

535205681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 535205681 is about 23134.5127677243. The cubic root of 535205681 is about 811.9081574277.

The spelling of 535205681 in words is "five hundred thirty-five million, two hundred five thousand, six hundred eighty-one".