213548609 has 8 divisors (see below), whose sum is σ = 214845480. Its totient is φ = 212256000.

The previous prime is 213548603. The next prime is 213548627. The reversal of 213548609 is 906845312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1555009 + 211993600 = 1247^2 + 14560^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213548609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213548603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177209 + ... + 178409.

It is an arithmetic number, because the mean of its divisors is an integer number (26855685).

Almost surely, 2^213548609 is an apocalyptic number.

It is an amenable number.

213548609 is a deficient number, since it is larger than the sum of its proper divisors (1296871).

213548609 is a wasteful number, since it uses less digits than its factorization.

213548609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 213548609 is about 14613.3024672728. The cubic root of 213548609 is about 597.7215522637.

The spelling of 213548609 in words is "two hundred thirteen million, five hundred forty-eight thousand, six hundred nine".