2154550109 has 2 divisors, whose sum is σ = 2154550110. Its totient is φ = 2154550108.

The previous prime is 2154550103. The next prime is 2154550133. The reversal of 2154550109 is 9010554512.

2154550109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1989427609 + 165122500 = 44603^2 + 12850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154550109 - 2⁸ = 2154549853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154550103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077275054 + 1077275055.

It is an arithmetic number, because the mean of its divisors is an integer number (1077275055).

Almost surely, 2^2154550109 is an apocalyptic number.

It is an amenable number.

2154550109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154550109 is an equidigital number, since it uses as much as digits as its factorization.

2154550109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 2154550109 is about 46417.1316326203. The cubic root of 2154550109 is about 1291.5727285542.

The spelling of 2154550109 in words is "two billion, one hundred fifty-four million, five hundred fifty thousand, one hundred nine".