213420555423 has 24 divisors (see below), whose sum is σ = 329402502000. Its totient is φ = 132682385664.

The previous prime is 213420555281. The next prime is 213420555427. The reversal of 213420555423 is 324555024312.

213420555423 is a `hidden beast` number, since 21 + 3 + 4 + 205 + 5 + 5 + 423 = 666.

It is not a de Polignac number, because 213420555423 - 2⁹ = 213420554911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213420555427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6381973 + ... + 6415326.

It is an arithmetic number, because the mean of its divisors is an integer number (13725104250).

Almost surely, 2^213420555423 is an apocalyptic number.

213420555423 is a deficient number, since it is larger than the sum of its proper divisors (115981946577).

213420555423 is a wasteful number, since it uses less digits than its factorization.

213420555423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12797431 (or 12797428 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 213420555423 its reverse (324555024312), we get a palindrome (537975579735).

The spelling of 213420555423 in words is "two hundred thirteen billion, four hundred twenty million, five hundred fifty-five thousand, four hundred twenty-three".