2154909233 has 2 divisors, whose sum is σ = 2154909234. Its totient is φ = 2154909232.

The previous prime is 2154909217. The next prime is 2154909311. The reversal of 2154909233 is 3329094512.

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., 2002831009 + 152078224 = 44753^2 + 12332^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154909233 - 2⁴ = 2154909217 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154909733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077454616 + 1077454617.

It is an arithmetic number, because the mean of its divisors is an integer number (1077454617).

Almost surely, 2^2154909233 is an apocalyptic number.

It is an amenable number.

2154909233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154909233 is an equidigital number, since it uses as much as digits as its factorization.

2154909233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 2154909233 is about 46420.9999138321. Note that the first 4 decimals coincide. The cubic root of 2154909233 is about 1291.6444850653.

The spelling of 2154909233 in words is "two billion, one hundred fifty-four million, nine hundred nine thousand, two hundred thirty-three".