213872424 has 32 divisors (see below), whose sum is σ = 535511520. Its totient is φ = 71180096.

The previous prime is 213872401. The next prime is 213872431. The reversal of 213872424 is 424278312.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9667 + ... + 22829.

It is an arithmetic number, because the mean of its divisors is an integer number (16734735).

Almost surely, 2^213872424 is an apocalyptic number.

213872424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213872424 is an abundant number, since it is smaller than the sum of its proper divisors (321639096).

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

213872424 is a wasteful number, since it uses less digits than its factorization.

213872424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13849 (or 13845 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 213872424 is about 14624.3777303515. The cubic root of 213872424 is about 598.0235185733.

The spelling of 213872424 in words is "two hundred thirteen million, eight hundred seventy-two thousand, four hundred twenty-four".