212313431 has 4 divisors (see below), whose sum is σ = 231614664. Its totient is φ = 193012200.

The previous prime is 212313383. The next prime is 212313433. The reversal of 212313431 is 134313212.

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 212313431 - 2¹⁴ = 212297047 is a prime.

It is a super-2 number, since 2×212313431² = 90153985965983522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212313433) 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, 9650600 + ... + 9650621.

It is an arithmetic number, because the mean of its divisors is an integer number (57903666).

Almost surely, 2^212313431 is an apocalyptic number.

212313431 is a deficient number, since it is larger than the sum of its proper divisors (19301233).

212313431 is a wasteful number, since it uses less digits than its factorization.

212313431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19301232.

The product of its digits is 432, while the sum is 20.

The square root of 212313431 is about 14570.9790679968. The cubic root of 212313431 is about 596.5669040715.

Adding to 212313431 its reverse (134313212), we get a palindrome (346626643).

The spelling of 212313431 in words is "two hundred twelve million, three hundred thirteen thousand, four hundred thirty-one".