212323431 has 8 divisors (see below), whose sum is σ = 284580864. Its totient is φ = 140807480.

The previous prime is 212323409. The next prime is 212323439. The reversal of 212323431 is 134323212.

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 212323431 - 2⁵ = 212323399 is a prime.

It is a super-2 number, since 2×212323431² = 90162478703223522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212323398 and 212323407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212323439) 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, 184701 + ... + 185846.

It is an arithmetic number, because the mean of its divisors is an integer number (35572608).

Almost surely, 2^212323431 is an apocalyptic number.

212323431 is a deficient number, since it is larger than the sum of its proper divisors (72257433).

212323431 is a wasteful number, since it uses less digits than its factorization.

212323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370741.

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

The square root of 212323431 is about 14571.3222117967. The cubic root of 212323431 is about 596.5762700599.

Adding to 212323431 its reverse (134323212), we get a palindrome (346646643).

The spelling of 212323431 in words is "two hundred twelve million, three hundred twenty-three thousand, four hundred thirty-one".