213047224 has 32 divisors (see below), whose sum is σ = 445032000. Its totient is φ = 94937472.

The previous prime is 213047167. The next prime is 213047231. The reversal of 213047224 is 422740312.

It is a happy number.

It is a super-3 number, since 3×213047224³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32304 + ... + 38335.

It is an arithmetic number, because the mean of its divisors is an integer number (13907250).

Almost surely, 2^213047224 is an apocalyptic number.

It is an amenable number.

213047224 is an abundant number, since it is smaller than the sum of its proper divisors (231984776).

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

213047224 is a wasteful number, since it uses less digits than its factorization.

213047224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70687 (or 70683 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 213047224 is about 14596.1372972441. The cubic root of 213047224 is about 597.2533942615.

Adding to 213047224 its reverse (422740312), we get a palindrome (635787536).

It can be divided in two parts, 2130472 and 24, that multiplied together give a triangular number (51131328 = T₁₀₁₁₂).

The spelling of 213047224 in words is "two hundred thirteen million, forty-seven thousand, two hundred twenty-four".