213899071 has 4 divisors (see below), whose sum is σ = 218873512. Its totient is φ = 208924632.

The previous prime is 213899047. The next prime is 213899089. The reversal of 213899071 is 170998312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213899071 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 (213899171) 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, 2487156 + ... + 2487241.

It is an arithmetic number, because the mean of its divisors is an integer number (54718378).

Almost surely, 2^213899071 is an apocalyptic number.

213899071 is a deficient number, since it is larger than the sum of its proper divisors (4974441).

213899071 is an equidigital number, since it uses as much as digits as its factorization.

213899071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974440.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 213899071 is about 14625.2887492863. The cubic root of 213899071 is about 598.0483540502.

The spelling of 213899071 in words is "two hundred thirteen million, eight hundred ninety-nine thousand, seventy-one".