2154430049 has 2 divisors, whose sum is σ = 2154430050. Its totient is φ = 2154430048.

The previous prime is 2154430001. The next prime is 2154430051. The reversal of 2154430049 is 9400344512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988535649 + 165894400 = 44593^2 + 12880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154430049 is a prime.

It is a Sophie Germain prime.

Together with 2154430051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2154429997 and 2154430024.

It is not a weakly prime, because it can be changed into another prime (2154438049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077215024 + 1077215025.

It is an arithmetic number, because the mean of its divisors is an integer number (1077215025).

Almost surely, 2^2154430049 is an apocalyptic number.

It is an amenable number.

2154430049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154430049 is an equidigital number, since it uses as much as digits as its factorization.

2154430049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 2154430049 is about 46415.8383421004. The cubic root of 2154430049 is about 1291.5487376057.

The spelling of 2154430049 in words is "two billion, one hundred fifty-four million, four hundred thirty thousand, forty-nine".