213573770 has 8 divisors (see below), whose sum is σ = 384432804. Its totient is φ = 85429504.

The previous prime is 213573757. The next prime is 213573793. The reversal of 213573770 is 77375312.

It can be written as a sum of positive squares in 2 ways, for example, as 180176929 + 33396841 = 13423^2 + 5779^2 .

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

It is a super-2 number, since 2×213573770² = 91227510464025800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213573770.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10678679 + ... + 10678698.

Almost surely, 2^213573770 is an apocalyptic number.

213573770 is a deficient number, since it is larger than the sum of its proper divisors (170859034).

213573770 is a wasteful number, since it uses less digits than its factorization.

213573770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21357384.

The product of its (nonzero) digits is 30870, while the sum is 35.

The square root of 213573770 is about 14614.1633356138. The cubic root of 213573770 is about 597.7450265153.

The spelling of 213573770 in words is "two hundred thirteen million, five hundred seventy-three thousand, seven hundred seventy".