201562541 has 2 divisors, whose sum is σ = 201562542. Its totient is φ = 201562540.

The previous prime is 201562513. The next prime is 201562549. The reversal of 201562541 is 145265102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201498025 + 64516 = 14195^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 201562541 - 2⁶ = 201562477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201562541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201562549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100781270 + 100781271.

It is an arithmetic number, because the mean of its divisors is an integer number (100781271).

Almost surely, 2^201562541 is an apocalyptic number.

It is an amenable number.

201562541 is a deficient number, since it is larger than the sum of its proper divisors (1).

201562541 is an equidigital number, since it uses as much as digits as its factorization.

201562541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 201562541 is about 14197.2723084401. The cubic root of 201562541 is about 586.3225644740.

The spelling of 201562541 in words is "two hundred one million, five hundred sixty-two thousand, five hundred forty-one".