212313261 has 8 divisors (see below), whose sum is σ = 283158144. Its totient is φ = 141505280.

The previous prime is 212313259. The next prime is 212313287. The reversal of 212313261 is 162313212.

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 212313261 - 2¹ = 212313259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212313251) 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, 9820 + ... + 22826.

It is an arithmetic number, because the mean of its divisors is an integer number (35394768).

Almost surely, 2^212313261 is an apocalyptic number.

It is an amenable number.

212313261 is a deficient number, since it is larger than the sum of its proper divisors (70844883).

212313261 is a wasteful number, since it uses less digits than its factorization.

212313261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18451.

The product of its digits is 432, while the sum is 21.

The square root of 212313261 is about 14570.9732344823. The cubic root of 212313261 is about 596.5667448471.

Adding to 212313261 its reverse (162313212), we get a palindrome (374626473).

The spelling of 212313261 in words is "two hundred twelve million, three hundred thirteen thousand, two hundred sixty-one".