2120531549 has 2 divisors, whose sum is σ = 2120531550. Its totient is φ = 2120531548.

The previous prime is 2120531513. The next prime is 2120531599. The reversal of 2120531549 is 9451350212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2106167449 + 14364100 = 45893^2 + 3790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120531549 - 2⁸ = 2120531293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120531599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060265774 + 1060265775.

It is an arithmetic number, because the mean of its divisors is an integer number (1060265775).

Almost surely, 2^2120531549 is an apocalyptic number.

It is an amenable number.

2120531549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120531549 is an equidigital number, since it uses as much as digits as its factorization.

2120531549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2120531549 is about 46049.2296243922. The cubic root of 2120531549 is about 1284.7390142551.

The spelling of 2120531549 in words is "two billion, one hundred twenty million, five hundred thirty-one thousand, five hundred forty-nine".