213812746 has 16 divisors (see below), whose sum is σ = 368075520. Its totient is φ = 91249200.

The previous prime is 213812743. The next prime is 213812771. The reversal of 213812746 is 647218312.

It is not an unprimeable number, because it can be changed into a prime (213812741) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28605 + ... + 35296.

It is an arithmetic number, because the mean of its divisors is an integer number (23004720).

Almost surely, 2^213812746 is an apocalyptic number.

213812746 is a deficient number, since it is larger than the sum of its proper divisors (154262774).

213812746 is a wasteful number, since it uses less digits than its factorization.

213812746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64149.

The product of its digits is 16128, while the sum is 34.

The square root of 213812746 is about 14622.3372276801. The cubic root of 213812746 is about 597.9678901339.

It can be divided in two parts, 2138 and 12746, that added together give a square (14884 = 122²).

The spelling of 213812746 in words is "two hundred thirteen million, eight hundred twelve thousand, seven hundred forty-six".