2155423513 has 2 divisors, whose sum is σ = 2155423514. Its totient is φ = 2155423512.

The previous prime is 2155423429. The next prime is 2155423531. The reversal of 2155423513 is 3153245512.

Together with next prime (2155423531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1762908169 + 392515344 = 41987^2 + 19812^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155423513 - 2¹³ = 2155415321 is a prime.

It is a super-2 number, since 2×2155423513² = 9291701040786522338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2155423573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077711756 + 1077711757.

It is an arithmetic number, because the mean of its divisors is an integer number (1077711757).

Almost surely, 2^2155423513 is an apocalyptic number.

It is an amenable number.

2155423513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155423513 is an equidigital number, since it uses as much as digits as its factorization.

2155423513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 31.

The square root of 2155423513 is about 46426.5388867187. The cubic root of 2155423513 is about 1291.7472293911.

The spelling of 2155423513 in words is "two billion, one hundred fifty-five million, four hundred twenty-three thousand, five hundred thirteen".