204522139 has 2 divisors, whose sum is σ = 204522140. Its totient is φ = 204522138.

The previous prime is 204522113. The next prime is 204522161. The reversal of 204522139 is 931225402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204522139 - 2⁷ = 204522011 is a prime.

It is a super-2 number, since 2×204522139² = 83658610682270642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204522179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102261069 + 102261070.

It is an arithmetic number, because the mean of its divisors is an integer number (102261070).

Almost surely, 2^204522139 is an apocalyptic number.

204522139 is a deficient number, since it is larger than the sum of its proper divisors (1).

204522139 is an equidigital number, since it uses as much as digits as its factorization.

204522139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 204522139 is about 14301.1236971086. The cubic root of 204522139 is about 589.1783439574.

The spelling of 204522139 in words is "two hundred four million, five hundred twenty-two thousand, one hundred thirty-nine".