213722107 has 4 divisors (see below), whose sum is σ = 213752176. Its totient is φ = 213692040.

The previous prime is 213722099. The next prime is 213722123. The reversal of 213722107 is 701227312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213722107 - 2³ = 213722099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213722407) 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, 2257 + ... + 20797.

It is an arithmetic number, because the mean of its divisors is an integer number (53438044).

Almost surely, 2^213722107 is an apocalyptic number.

213722107 is a deficient number, since it is larger than the sum of its proper divisors (30069).

213722107 is a wasteful number, since it uses less digits than its factorization.

213722107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30068.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 213722107 is about 14619.2375656188. The cubic root of 213722107 is about 597.8833818074.

Adding to 213722107 its reverse (701227312), we get a palindrome (914949419).

The spelling of 213722107 in words is "two hundred thirteen million, seven hundred twenty-two thousand, one hundred seven".