213444452423 has 4 divisors (see below), whose sum is σ = 213475469688. Its totient is φ = 213413435160.

The previous prime is 213444452413. The next prime is 213444452471. The reversal of 213444452423 is 324254444312.

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 213444452423 - 2⁶ = 213444452359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213444452413) 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, 15498308 + ... + 15512073.

It is an arithmetic number, because the mean of its divisors is an integer number (53368867422).

Almost surely, 2^213444452423 is an apocalyptic number.

213444452423 is a deficient number, since it is larger than the sum of its proper divisors (31017265).

213444452423 is an equidigital number, since it uses as much as digits as its factorization.

213444452423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31017264.

The product of its digits is 368640, while the sum is 38.

Adding to 213444452423 its reverse (324254444312), we get a palindrome (537698896735).

The spelling of 213444452423 in words is "two hundred thirteen billion, four hundred forty-four million, four hundred fifty-two thousand, four hundred twenty-three".