205142145541 has 2 divisors, whose sum is σ = 205142145542. Its totient is φ = 205142145540.

The previous prime is 205142145517. The next prime is 205142145563. The reversal of 205142145541 is 145541241502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196378377316 + 8763768225 = 443146^2 + 93615^2 .

It is a cyclic number.

It is not a de Polignac number, because 205142145541 - 2¹⁹ = 205141621253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205142145497 and 205142145506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205142145941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102571072770 + 102571072771.

It is an arithmetic number, because the mean of its divisors is an integer number (102571072771).

Almost surely, 2^205142145541 is an apocalyptic number.

It is an amenable number.

205142145541 is a deficient number, since it is larger than the sum of its proper divisors (1).

205142145541 is an equidigital number, since it uses as much as digits as its factorization.

205142145541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32000, while the sum is 34.

The spelling of 205142145541 in words is "two hundred five billion, one hundred forty-two million, one hundred forty-five thousand, five hundred forty-one".