204065531 has 2 divisors, whose sum is σ = 204065532. Its totient is φ = 204065530.

The previous prime is 204065507. The next prime is 204065597. The reversal of 204065531 is 135560402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204065531 - 2¹⁰ = 204064507 is a prime.

It is a super-2 number, since 2×204065531² = 83285481884623922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204065531.

It is not a weakly prime, because it can be changed into another prime (204025531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102032765 + 102032766.

It is an arithmetic number, because the mean of its divisors is an integer number (102032766).

Almost surely, 2^204065531 is an apocalyptic number.

204065531 is a deficient number, since it is larger than the sum of its proper divisors (1).

204065531 is an equidigital number, since it uses as much as digits as its factorization.

204065531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 204065531 is about 14285.1507167408. The cubic root of 204065531 is about 588.7395585378.

The spelling of 204065531 in words is "two hundred four million, sixty-five thousand, five hundred thirty-one".