2155532047 has 2 divisors, whose sum is σ = 2155532048. Its totient is φ = 2155532046.

The previous prime is 2155532023. The next prime is 2155532069. The reversal of 2155532047 is 7402355512.

2155532047 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 2155532047 - 2⁷ = 2155531919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155532087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077766023 + 1077766024.

It is an arithmetic number, because the mean of its divisors is an integer number (1077766024).

Almost surely, 2^2155532047 is an apocalyptic number.

2155532047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155532047 is an equidigital number, since it uses as much as digits as its factorization.

2155532047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 2155532047 is about 46427.7077508679. The cubic root of 2155532047 is about 1291.7689105348.

Adding to 2155532047 its reverse (7402355512), we get a palindrome (9557887559).

The spelling of 2155532047 in words is "two billion, one hundred fifty-five million, five hundred thirty-two thousand, forty-seven".