2081454521 has 2 divisors, whose sum is σ = 2081454522. Its totient is φ = 2081454520.

The previous prime is 2081454491. The next prime is 2081454547. The reversal of 2081454521 is 1254541802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2078356921 + 3097600 = 45589^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081454521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2081414521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040727260 + 1040727261.

It is an arithmetic number, because the mean of its divisors is an integer number (1040727261).

Almost surely, 2^2081454521 is an apocalyptic number.

It is an amenable number.

2081454521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081454521 is an equidigital number, since it uses as much as digits as its factorization.

2081454521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 2081454521 is about 45622.9604585235. The cubic root of 2081454521 is about 1276.7983380870.

The spelling of 2081454521 in words is "two billion, eighty-one million, four hundred fifty-four thousand, five hundred twenty-one".