213842555 has 4 divisors (see below), whose sum is σ = 256611072. Its totient is φ = 171074040.

The previous prime is 213842543. The next prime is 213842561. The reversal of 213842555 is 555248312.

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

It is not a de Polignac number, because 213842555 - 2¹⁰ = 213841531 is a prime.

It is a Duffinian 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, 21384251 + ... + 21384260.

It is an arithmetic number, because the mean of its divisors is an integer number (64152768).

Almost surely, 2^213842555 is an apocalyptic number.

213842555 is a deficient number, since it is larger than the sum of its proper divisors (42768517).

213842555 is an equidigital number, since it uses as much as digits as its factorization.

213842555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42768516.

The product of its digits is 48000, while the sum is 35.

The square root of 213842555 is about 14623.3564888503. The cubic root of 213842555 is about 597.9956776830.

The spelling of 213842555 in words is "two hundred thirteen million, eight hundred forty-two thousand, five hundred fifty-five".