212323407 has 4 divisors (see below), whose sum is σ = 283097880. Its totient is φ = 141548936.

The previous prime is 212323403. The next prime is 212323409. The reversal of 212323407 is 704323212.

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 212323407 - 2² = 212323403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212323403) 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, 35387232 + ... + 35387237.

It is an arithmetic number, because the mean of its divisors is an integer number (70774470).

Almost surely, 2^212323407 is an apocalyptic number.

212323407 is a deficient number, since it is larger than the sum of its proper divisors (70774473).

212323407 is an equidigital number, since it uses as much as digits as its factorization.

212323407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70774472.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 212323407 is about 14571.3213882613. The cubic root of 212323407 is about 596.5762475818.

Adding to 212323407 its reverse (704323212), we get a palindrome (916646619).

The spelling of 212323407 in words is "two hundred twelve million, three hundred twenty-three thousand, four hundred seven".