2081549 has 2 divisors, whose sum is σ = 2081550. Its totient is φ = 2081548.

The previous prime is 2081537. The next prime is 2081561. The reversal of 2081549 is 9451802.

It is a balanced prime because it is at equal distance from previous prime (2081537) and next prime (2081561).

It can be written as a sum of positive squares in only one way, i.e., 1841449 + 240100 = 1357^2 + 490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040774 + 1040775.

It is an arithmetic number, because the mean of its divisors is an integer number (1040775).

2^2081549 is an apocalyptic number.

It is an amenable number.

2081549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081549 is an equidigital number, since it uses as much as digits as its factorization.

2081549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2081549 is about 1442.7574293692. The cubic root of 2081549 is about 127.6817656117.

The spelling of 2081549 in words is "two million, eighty-one thousand, five hundred forty-nine".