213573630 has 64 divisors (see below), whose sum is σ = 540546048. Its totient is φ = 53898240.

The previous prime is 213573629. The next prime is 213573637. The reversal of 213573630 is 36375312.

It is a super-2 number, since 2×213573630² = 91227390862753800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213573637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65335 + ... + 68525.

It is an arithmetic number, because the mean of its divisors is an integer number (8446032).

Almost surely, 2^213573630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213573630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270273024).

213573630 is an abundant number, since it is smaller than the sum of its proper divisors (326972418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213573630 is a wasteful number, since it uses less digits than its factorization.

213573630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321.

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 213573630 is about 14614.1585457391. The cubic root of 213573630 is about 597.7448959058.

The spelling of 213573630 in words is "two hundred thirteen million, five hundred seventy-three thousand, six hundred thirty".