213995971 has 8 divisors (see below), whose sum is σ = 246032640. Its totient is φ = 182325768.

The previous prime is 213995953. The next prime is 213995987. The reversal of 213995971 is 179599312.

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 213995971 - 2¹³ = 213987779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213992971) 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, 90361 + ... + 92698.

It is an arithmetic number, because the mean of its divisors is an integer number (30754080).

Almost surely, 2^213995971 is an apocalyptic number.

213995971 is a deficient number, since it is larger than the sum of its proper divisors (32036669).

213995971 is a wasteful number, since it uses less digits than its factorization.

213995971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183233.

The product of its digits is 153090, while the sum is 46.

The square root of 213995971 is about 14628.6011292946. The cubic root of 213995971 is about 598.1386491857.

The spelling of 213995971 in words is "two hundred thirteen million, nine hundred ninety-five thousand, nine hundred seventy-one".