201541425521 has 2 divisors, whose sum is σ = 201541425522. Its totient is φ = 201541425520.

The previous prime is 201541425497. The next prime is 201541425529. The reversal of 201541425521 is 125524145102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128891770225 + 72649655296 = 359015^2 + 269536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201541425521 is a prime.

It is not a weakly prime, because it can be changed into another prime (201541425529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100770712760 + 100770712761.

It is an arithmetic number, because the mean of its divisors is an integer number (100770712761).

Almost surely, 2^201541425521 is an apocalyptic number.

It is an amenable number.

201541425521 is a deficient number, since it is larger than the sum of its proper divisors (1).

201541425521 is an equidigital number, since it uses as much as digits as its factorization.

201541425521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 201541425521 in words is "two hundred one billion, five hundred forty-one million, four hundred twenty-five thousand, five hundred twenty-one".