213809355 has 16 divisors (see below), whose sum is σ = 380105760. Its totient is φ = 114031584.

The previous prime is 213809341. The next prime is 213809359. The reversal of 213809355 is 553908312.

It is not a de Polignac number, because 213809355 - 2⁴ = 213809339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213809359) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 791752 + ... + 792021.

It is an arithmetic number, because the mean of its divisors is an integer number (23756610).

Almost surely, 2^213809355 is an apocalyptic number.

213809355 is a deficient number, since it is larger than the sum of its proper divisors (166296405).

213809355 is a wasteful number, since it uses less digits than its factorization.

213809355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583787 (or 1583781 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 213809355 is about 14622.2212744849. The cubic root of 213809355 is about 597.9647289257.

The spelling of 213809355 in words is "two hundred thirteen million, eight hundred nine thousand, three hundred fifty-five".