2030521309 has 2 divisors, whose sum is σ = 2030521310. Its totient is φ = 2030521308.

The previous prime is 2030521289. The next prime is 2030521331. The reversal of 2030521309 is 9031250302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2005069284 + 25452025 = 44778^2 + 5045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2030521309 - 2¹⁷ = 2030390237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2030521369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015260654 + 1015260655.

It is an arithmetic number, because the mean of its divisors is an integer number (1015260655).

Almost surely, 2^2030521309 is an apocalyptic number.

It is an amenable number.

2030521309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2030521309 is an equidigital number, since it uses as much as digits as its factorization.

2030521309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 2030521309 is about 45061.3061173331. The cubic root of 2030521309 is about 1266.2977945823.

It can be divided in two parts, 20305 and 21309, that added together give a palindrome (41614).

The spelling of 2030521309 in words is "two billion, thirty million, five hundred twenty-one thousand, three hundred nine".