213871355 has 4 divisors (see below), whose sum is σ = 256645632. Its totient is φ = 171097080.

The previous prime is 213871351. The next prime is 213871369. The reversal of 213871355 is 553178312.

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

It is not a de Polignac number, because 213871355 - 2² = 213871351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213871351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21387131 + ... + 21387140.

It is an arithmetic number, because the mean of its divisors is an integer number (64161408).

Almost surely, 2^213871355 is an apocalyptic number.

213871355 is a deficient number, since it is larger than the sum of its proper divisors (42774277).

213871355 is an equidigital number, since it uses as much as digits as its factorization.

213871355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42774276.

The product of its digits is 25200, while the sum is 35.

The square root of 213871355 is about 14624.3411817422. The cubic root of 213871355 is about 598.0225222033.

The spelling of 213871355 in words is "two hundred thirteen million, eight hundred seventy-one thousand, three hundred fifty-five".