213444123 has 8 divisors (see below), whose sum is σ = 289416000. Its totient is φ = 139884168.

The previous prime is 213444097. The next prime is 213444137. The reversal of 213444123 is 321444312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213444123 - 2¹² = 213440027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213444093 and 213444102.

It is not an unprimeable number, because it can be changed into a prime (213444193) 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, 602773 + ... + 603126.

It is an arithmetic number, because the mean of its divisors is an integer number (36177000).

Almost surely, 2^213444123 is an apocalyptic number.

213444123 is a deficient number, since it is larger than the sum of its proper divisors (75971877).

213444123 is a wasteful number, since it uses less digits than its factorization.

213444123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205961.

The product of its digits is 2304, while the sum is 24.

The square root of 213444123 is about 14609.7269995028. The cubic root of 213444123 is about 597.6240510858.

Adding to 213444123 its reverse (321444312), we get a palindrome (534888435).

The spelling of 213444123 in words is "two hundred thirteen million, four hundred forty-four thousand, one hundred twenty-three".