2081549453 has 2 divisors, whose sum is σ = 2081549454. Its totient is φ = 2081549452.

The previous prime is 2081549363. The next prime is 2081549471. The reversal of 2081549453 is 3549451802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1705111849 + 376437604 = 41293^2 + 19402^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081549453 - 2¹⁸ = 2081287309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2081549453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081549753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040774726 + 1040774727.

It is an arithmetic number, because the mean of its divisors is an integer number (1040774727).

Almost surely, 2^2081549453 is an apocalyptic number.

It is an amenable number.

2081549453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081549453 is an equidigital number, since it uses as much as digits as its factorization.

2081549453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 2081549453 is about 45624.0008438541. Note that the first 3 decimals coincide. The cubic root of 2081549453 is about 1276.8177487405.

The spelling of 2081549453 in words is "two billion, eighty-one million, five hundred forty-nine thousand, four hundred fifty-three".