2155434455 has 4 divisors (see below), whose sum is σ = 2586521352. Its totient is φ = 1724347560.

The previous prime is 2155434389. The next prime is 2155434467. The reversal of 2155434455 is 5544345512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2155434455 - 2¹² = 2155430359 is a prime.

It is a super-2 number, since 2×2155434455² = 9291795379602294050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215543441 + ... + 215543450.

It is an arithmetic number, because the mean of its divisors is an integer number (646630338).

Almost surely, 2^2155434455 is an apocalyptic number.

2155434455 is a deficient number, since it is larger than the sum of its proper divisors (431086897).

2155434455 is an equidigital number, since it uses as much as digits as its factorization.

2155434455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431086896.

The product of its digits is 240000, while the sum is 38.

The square root of 2155434455 is about 46426.6567286511. The cubic root of 2155434455 is about 1291.7494152375.

Adding to 2155434455 its reverse (5544345512), we get a palindrome (7699779967).

The spelling of 2155434455 in words is "two billion, one hundred fifty-five million, four hundred thirty-four thousand, four hundred fifty-five".