212413231 has 4 divisors (see below), whose sum is σ = 212563512. Its totient is φ = 212262952.

The previous prime is 212413213. The next prime is 212413237. The reversal of 212413231 is 132314212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212413231 - 2⁵ = 212413199 is a prime.

It is a super-2 number, since 2×212413231² = 90238761407718722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212413199 and 212413208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212413237) 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, 73000 + ... + 75853.

It is an arithmetic number, because the mean of its divisors is an integer number (53140878).

Almost surely, 2^212413231 is an apocalyptic number.

212413231 is a deficient number, since it is larger than the sum of its proper divisors (150281).

212413231 is a wasteful number, since it uses less digits than its factorization.

212413231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150280.

The product of its digits is 288, while the sum is 19.

The square root of 212413231 is about 14574.4032810953. The cubic root of 212413231 is about 596.6603634607.

Adding to 212413231 its reverse (132314212), we get a palindrome (344727443).

The spelling of 212413231 in words is "two hundred twelve million, four hundred thirteen thousand, two hundred thirty-one".