213423144 has 32 divisors (see below), whose sum is σ = 582063840. Its totient is φ = 64673600.

The previous prime is 213423139. The next prime is 213423167. The reversal of 213423144 is 441324312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403947 + ... + 404474.

It is an arithmetic number, because the mean of its divisors is an integer number (18189495).

Almost surely, 2^213423144 is an apocalyptic number.

213423144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213423144 is an abundant number, since it is smaller than the sum of its proper divisors (368640696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213423144 is a wasteful number, since it uses less digits than its factorization.

213423144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808441 (or 808437 counting only the distinct ones).

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

The square root of 213423144 is about 14609.0090012978. The cubic root of 213423144 is about 597.6044706830.

Adding to 213423144 its reverse (441324312), we get a palindrome (654747456).

The spelling of 213423144 in words is "two hundred thirteen million, four hundred twenty-three thousand, one hundred forty-four".