204513149 has 2 divisors, whose sum is σ = 204513150. Its totient is φ = 204513148.

The previous prime is 204513143. The next prime is 204513193. The reversal of 204513149 is 941315402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107785924 + 96727225 = 10382^2 + 9835^2 .

It is a cyclic number.

It is not a de Polignac number, because 204513149 - 2¹⁶ = 204447613 is a prime.

It is a super-2 number, since 2×204513149² = 83651256227792402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204513143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102256574 + 102256575.

It is an arithmetic number, because the mean of its divisors is an integer number (102256575).

Almost surely, 2^204513149 is an apocalyptic number.

It is an amenable number.

204513149 is a deficient number, since it is larger than the sum of its proper divisors (1).

204513149 is an equidigital number, since it uses as much as digits as its factorization.

204513149 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 29.

The square root of 204513149 is about 14300.8093826888. The cubic root of 204513149 is about 589.1697111659.

The spelling of 204513149 in words is "two hundred four million, five hundred thirteen thousand, one hundred forty-nine".