213423454 has 4 divisors (see below), whose sum is σ = 320135184. Its totient is φ = 106711726.

The previous prime is 213423451. The next prime is 213423479. The reversal of 213423454 is 454324312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213423451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53355862 + ... + 53355865.

It is an arithmetic number, because the mean of its divisors is an integer number (80033796).

Almost surely, 2^213423454 is an apocalyptic number.

213423454 is a deficient number, since it is larger than the sum of its proper divisors (106711730).

213423454 is a wasteful number, since it uses less digits than its factorization.

213423454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106711729.

The product of its digits is 11520, while the sum is 28.

The square root of 213423454 is about 14609.0196111854. The cubic root of 213423454 is about 597.6047600257.

Adding to 213423454 its reverse (454324312), we get a palindrome (667747766).

The spelling of 213423454 in words is "two hundred thirteen million, four hundred twenty-three thousand, four hundred fifty-four".