213355454405 has 4 divisors (see below), whose sum is σ = 256026545292. Its totient is φ = 170684363520.

The previous prime is 213355454393. The next prime is 213355454413. The reversal of 213355454405 is 504454553312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105613300324 + 107742154081 = 324982^2 + 328241^2 .

It is not a de Polignac number, because 213355454405 - 2³⁰ = 212281712581 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, 21335545436 + ... + 21335545445.

It is an arithmetic number, because the mean of its divisors is an integer number (64006636323).

Almost surely, 2^213355454405 is an apocalyptic number.

It is an amenable number.

213355454405 is a deficient number, since it is larger than the sum of its proper divisors (42671090887).

213355454405 is an equidigital number, since it uses as much as digits as its factorization.

213355454405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42671090886.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 213355454405 in words is "two hundred thirteen billion, three hundred fifty-five million, four hundred fifty-four thousand, four hundred five".