213533670 has 96 divisors (see below), whose sum is σ = 616831200. Its totient is φ = 47115264.

The previous prime is 213533669. The next prime is 213533681. The reversal of 213533670 is 76335312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40126 + ... + 45134.

It is an arithmetic number, because the mean of its divisors is an integer number (6425325).

Almost surely, 2^213533670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213533670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308415600).

213533670 is an abundant number, since it is smaller than the sum of its proper divisors (403297530).

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

213533670 is a wasteful number, since it uses less digits than its factorization.

213533670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062 (or 5055 counting only the distinct ones).

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

The square root of 213533670 is about 14612.7913144615. The cubic root of 213533670 is about 597.7076138751.

Adding to 213533670 its reverse (76335312), we get a palindrome (289868982).

The spelling of 213533670 in words is "two hundred thirteen million, five hundred thirty-three thousand, six hundred seventy".