213224331 has 16 divisors (see below), whose sum is σ = 288398880. Its totient is φ = 140110080.

The previous prime is 213224311. The next prime is 213224359. The reversal of 213224331 is 133422312.

It is not a de Polignac number, because 213224331 - 2¹³ = 213216139 is a prime.

It is a super-2 number, since 2×213224331² = 90929230660795122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213224298 and 213224307.

It is not an unprimeable number, because it can be changed into a prime (213224311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98521 + ... + 100661.

It is an arithmetic number, because the mean of its divisors is an integer number (18024930).

Almost surely, 2^213224331 is an apocalyptic number.

213224331 is a deficient number, since it is larger than the sum of its proper divisors (75174549).

213224331 is a wasteful number, since it uses less digits than its factorization.

213224331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its digits is 864, while the sum is 21.

The square root of 213224331 is about 14602.2029502401. The cubic root of 213224331 is about 597.4188481255.

Adding to 213224331 its reverse (133422312), we get a palindrome (346646643).

The spelling of 213224331 in words is "two hundred thirteen million, two hundred twenty-four thousand, three hundred thirty-one".