213573455 has 4 divisors (see below), whose sum is σ = 256288152. Its totient is φ = 170858760.

The previous prime is 213573407. The next prime is 213573457. The reversal of 213573455 is 554375312.

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

It is not a de Polignac number, because 213573455 - 2¹⁰ = 213572431 is a prime.

It is a super-2 number, since 2×213573455² = 91227241361274050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213573457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21357341 + ... + 21357350.

It is an arithmetic number, because the mean of its divisors is an integer number (64072038).

Almost surely, 2^213573455 is an apocalyptic number.

213573455 is a deficient number, since it is larger than the sum of its proper divisors (42714697).

213573455 is an equidigital number, since it uses as much as digits as its factorization.

213573455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42714696.

The product of its digits is 63000, while the sum is 35.

The square root of 213573455 is about 14614.1525583935. The cubic root of 213573455 is about 597.7447326438.

The spelling of 213573455 in words is "two hundred thirteen million, five hundred seventy-three thousand, four hundred fifty-five".