213245734 has 16 divisors (see below), whose sum is σ = 344781360. Its totient is φ = 98333280.

The previous prime is 213245713. The next prime is 213245749. The reversal of 213245734 is 437542312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213245696 and 213245705.

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, 32937 + ... + 38875.

It is an arithmetic number, because the mean of its divisors is an integer number (21548835).

Almost surely, 2^213245734 is an apocalyptic number.

213245734 is a deficient number, since it is larger than the sum of its proper divisors (131535626).

213245734 is a wasteful number, since it uses less digits than its factorization.

213245734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335.

The product of its digits is 20160, while the sum is 31.

The square root of 213245734 is about 14602.9358007217. The cubic root of 213245734 is about 597.4388366633.

The spelling of 213245734 in words is "two hundred thirteen million, two hundred forty-five thousand, seven hundred thirty-four".