213700406 has 16 divisors (see below), whose sum is σ = 334969344. Its totient is φ = 102057384.

The previous prime is 213700397. The next prime is 213700427. The reversal of 213700406 is 604007312.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33251 + ... + 39153.

It is an arithmetic number, because the mean of its divisors is an integer number (20935584).

Almost surely, 2^213700406 is an apocalyptic number.

213700406 is a deficient number, since it is larger than the sum of its proper divisors (121268938).

213700406 is a wasteful number, since it uses less digits than its factorization.

213700406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6715.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 213700406 is about 14618.4953398084. The cubic root of 213700406 is about 597.8631450825.

Adding to 213700406 its reverse (604007312), we get a palindrome (817707718).

The spelling of 213700406 in words is "two hundred thirteen million, seven hundred thousand, four hundred six".