201601549 has 2 divisors, whose sum is σ = 201601550. Its totient is φ = 201601548.

The previous prime is 201601513. The next prime is 201601553. The reversal of 201601549 is 945106102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197964900 + 3636649 = 14070^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 201601549 - 2¹⁵ = 201568781 is a prime.

It is equal to p_11162692 and since 201601549 and 11162692 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201601579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100800774 + 100800775.

It is an arithmetic number, because the mean of its divisors is an integer number (100800775).

Almost surely, 2^201601549 is an apocalyptic number.

It is an amenable number.

201601549 is a deficient number, since it is larger than the sum of its proper divisors (1).

201601549 is an equidigital number, since it uses as much as digits as its factorization.

201601549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 201601549 is about 14198.6460269985. The cubic root of 201601549 is about 586.3603853165.

The spelling of 201601549 in words is "two hundred one million, six hundred one thousand, five hundred forty-nine".