213012071 has 8 divisors (see below), whose sum is σ = 219442704. Its totient is φ = 206616960.

The previous prime is 213012049. The next prime is 213012073. The reversal of 213012071 is 170210312.

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

It is a cyclic number.

It is not a de Polignac number, because 213012071 - 2¹⁰ = 213011047 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 (213012073) 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, 3551 + ... + 20943.

It is an arithmetic number, because the mean of its divisors is an integer number (27430338).

Almost surely, 2^213012071 is an apocalyptic number.

213012071 is a deficient number, since it is larger than the sum of its proper divisors (6430633).

213012071 is a wasteful number, since it uses less digits than its factorization.

213012071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17761.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 213012071 is about 14594.9330591134. The cubic root of 213012071 is about 597.2205433235.

Adding to 213012071 its reverse (170210312), we get a palindrome (383222383).

The spelling of 213012071 in words is "two hundred thirteen million, twelve thousand, seventy-one".