213578721830 has 8 divisors (see below), whose sum is σ = 384441699312. Its totient is φ = 85431488728.

The previous prime is 213578721827. The next prime is 213578721833. The reversal of 213578721830 is 38127875312.

It is an interprime number because it is at equal distance from previous prime (213578721827) and next prime (213578721833).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213578721833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10678936082 + ... + 10678936101.

It is an arithmetic number, because the mean of its divisors is an integer number (48055212414).

Almost surely, 2^213578721830 is an apocalyptic number.

213578721830 is a deficient number, since it is larger than the sum of its proper divisors (170862977482).

213578721830 is a wasteful number, since it uses less digits than its factorization.

213578721830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21357872190.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 213578721830 in words is "two hundred thirteen billion, five hundred seventy-eight million, seven hundred twenty-one thousand, eight hundred thirty".