213653653 has 4 divisors (see below), whose sum is σ = 217684908. Its totient is φ = 209622400.

The previous prime is 213653623. The next prime is 213653663. The reversal of 213653653 is 356356312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144048004 + 69605649 = 12002^2 + 8343^2 .

It is a cyclic number.

It is not a de Polignac number, because 213653653 - 2¹⁷ = 213522581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213653623) 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 3 ways as a sum of consecutive naturals, for example, 2015548 + ... + 2015653.

It is an arithmetic number, because the mean of its divisors is an integer number (54421227).

Almost surely, 2^213653653 is an apocalyptic number.

It is an amenable number.

213653653 is a deficient number, since it is larger than the sum of its proper divisors (4031255).

213653653 is an equidigital number, since it uses as much as digits as its factorization.

213653653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031254.

The product of its digits is 48600, while the sum is 34.

The square root of 213653653 is about 14616.8961479515. The cubic root of 213653653 is about 597.8195420858.

The spelling of 213653653 in words is "two hundred thirteen million, six hundred fifty-three thousand, six hundred fifty-three".