212401423 has 16 divisors (see below), whose sum is σ = 243038880. Its totient is φ = 184173696.

The previous prime is 212401411. The next prime is 212401439. The reversal of 212401423 is 324104212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212401423 is a prime.

It is a super-2 number, since 2×212401423² = 90228728984849858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212401423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212401523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6336 + ... + 21562.

It is an arithmetic number, because the mean of its divisors is an integer number (15189930).

Almost surely, 2^212401423 is an apocalyptic number.

212401423 is a deficient number, since it is larger than the sum of its proper divisors (30637457).

212401423 is a wasteful number, since it uses less digits than its factorization.

212401423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15306.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 212401423 is about 14573.9981816933. The cubic root of 212401423 is about 596.6493071875.

Adding to 212401423 its reverse (324104212), we get a palindrome (536505635).

The spelling of 212401423 in words is "two hundred twelve million, four hundred one thousand, four hundred twenty-three".