2102405455 has 4 divisors (see below), whose sum is σ = 2522886552. Its totient is φ = 1681924360.

The previous prime is 2102405449. The next prime is 2102405471. The reversal of 2102405455 is 5545042012.

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

It is not a de Polignac number, because 2102405455 - 2³ = 2102405447 is a prime.

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, 210240541 + ... + 210240550.

It is an arithmetic number, because the mean of its divisors is an integer number (630721638).

Almost surely, 2^2102405455 is an apocalyptic number.

2102405455 is a deficient number, since it is larger than the sum of its proper divisors (420481097).

2102405455 is an equidigital number, since it uses as much as digits as its factorization.

2102405455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420481096.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 2102405455 is about 45851.9951038120. The cubic root of 2102405455 is about 1281.0679269176.

Adding to 2102405455 its reverse (5545042012), we get a palindrome (7647447467).

The spelling of 2102405455 in words is "two billion, one hundred two million, four hundred five thousand, four hundred fifty-five".