212501423 has 4 divisors (see below), whose sum is σ = 212593200. Its totient is φ = 212409648.

The previous prime is 212501417. The next prime is 212501449. The reversal of 212501423 is 324105212.

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 212501423 - 2⁴ = 212501407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212501395 and 212501404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212501413) 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, 42323 + ... + 47076.

It is an arithmetic number, because the mean of its divisors is an integer number (53148300).

Almost surely, 2^212501423 is an apocalyptic number.

212501423 is a deficient number, since it is larger than the sum of its proper divisors (91777).

212501423 is an equidigital number, since it uses as much as digits as its factorization.

212501423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91776.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212501423 is about 14577.4285455289. The cubic root of 212501423 is about 596.7429279815.

Adding to 212501423 its reverse (324105212), we get a palindrome (536606635).

The spelling of 212501423 in words is "two hundred twelve million, five hundred one thousand, four hundred twenty-three".