205451149 has 2 divisors, whose sum is σ = 205451150. Its totient is φ = 205451148.

The previous prime is 205451131. The next prime is 205451159. The reversal of 205451149 is 941154502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130074025 + 75377124 = 11405^2 + 8682^2 .

It is a cyclic number.

It is not a de Polignac number, because 205451149 - 2¹³ = 205442957 is a prime.

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 205451149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205451159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102725574 + 102725575.

It is an arithmetic number, because the mean of its divisors is an integer number (102725575).

Almost surely, 2^205451149 is an apocalyptic number.

It is an amenable number.

205451149 is a deficient number, since it is larger than the sum of its proper divisors (1).

205451149 is an equidigital number, since it uses as much as digits as its factorization.

205451149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 205451149 is about 14333.5672112702. The cubic root of 205451149 is about 590.0690802960.

The spelling of 205451149 in words is "two hundred five million, four hundred fifty-one thousand, one hundred forty-nine".