213691071 has 32 divisors (see below), whose sum is σ = 335363328. Its totient is φ = 119575040.

The previous prime is 213691067. The next prime is 213691087. The reversal of 213691071 is 170196312.

It is a cyclic number.

It is not a de Polignac number, because 213691071 - 2² = 213691067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213691171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26140 + ... + 33326.

It is an arithmetic number, because the mean of its divisors is an integer number (10480104).

Almost surely, 2^213691071 is an apocalyptic number.

213691071 is a deficient number, since it is larger than the sum of its proper divisors (121672257).

213691071 is a wasteful number, since it uses less digits than its factorization.

213691071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7271.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 213691071 is about 14618.1760490151. The cubic root of 213691071 is about 597.8544395403.

The spelling of 213691071 in words is "two hundred thirteen million, six hundred ninety-one thousand, seventy-one".