213648307 has 4 divisors (see below), whose sum is σ = 221015520. Its totient is φ = 206281096.

The previous prime is 213648283. The next prime is 213648317. The reversal of 213648307 is 703846312.

It is a happy number.

213648307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 213648307 - 2²³ = 205259699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213648317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3683563 + ... + 3683620.

It is an arithmetic number, because the mean of its divisors is an integer number (55253880).

Almost surely, 2^213648307 is an apocalyptic number.

213648307 is a deficient number, since it is larger than the sum of its proper divisors (7367213).

213648307 is an equidigital number, since it uses as much as digits as its factorization.

213648307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367212.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 213648307 is about 14616.7132762465. The cubic root of 213648307 is about 597.8145558696.

The spelling of 213648307 in words is "two hundred thirteen million, six hundred forty-eight thousand, three hundred seven".