2153278811 has 2 divisors, whose sum is σ = 2153278812. Its totient is φ = 2153278810.

The previous prime is 2153278783. The next prime is 2153278819. The reversal of 2153278811 is 1188723512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2153278811 - 2²⁶ = 2086169947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2153278819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076639405 + 1076639406.

It is an arithmetic number, because the mean of its divisors is an integer number (1076639406).

Almost surely, 2^2153278811 is an apocalyptic number.

2153278811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153278811 is an equidigital number, since it uses as much as digits as its factorization.

2153278811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 38.

The square root of 2153278811 is about 46403.4353361904. The cubic root of 2153278811 is about 1291.3186466036.

The spelling of 2153278811 in words is "two billion, one hundred fifty-three million, two hundred seventy-eight thousand, eight hundred eleven".