2154909311 has 2 divisors, whose sum is σ = 2154909312. Its totient is φ = 2154909310.

The previous prime is 2154909233. The next prime is 2154909319. The reversal of 2154909311 is 1139094512.

It is a happy number.

2154909311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154909311 - 2³⁰ = 1081167487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154909319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077454655 + 1077454656.

It is an arithmetic number, because the mean of its divisors is an integer number (1077454656).

Almost surely, 2^2154909311 is an apocalyptic number.

2154909311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154909311 is an equidigital number, since it uses as much as digits as its factorization.

2154909311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 2154909311 is about 46421.0007539691. Note that the first 3 decimals coincide. The cubic root of 2154909311 is about 1291.6445006496.

The spelling of 2154909311 in words is "two billion, one hundred fifty-four million, nine hundred nine thousand, three hundred eleven".