2154519049 has 2 divisors, whose sum is σ = 2154519050. Its totient is φ = 2154519048.

The previous prime is 2154519013. The next prime is 2154519077. The reversal of 2154519049 is 9409154512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1945427449 + 209091600 = 44107^2 + 14460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154519049 - 2⁷ = 2154518921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154519349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077259524 + 1077259525.

It is an arithmetic number, because the mean of its divisors is an integer number (1077259525).

Almost surely, 2^2154519049 is an apocalyptic number.

It is an amenable number.

2154519049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154519049 is an equidigital number, since it uses as much as digits as its factorization.

2154519049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 2154519049 is about 46416.7970566690. The cubic root of 2154519049 is about 1291.5665220858.

The spelling of 2154519049 in words is "two billion, one hundred fifty-four million, five hundred nineteen thousand, forty-nine".