213222552 has 64 divisors (see below), whose sum is σ = 548042880. Its totient is φ = 69092352.

The previous prime is 213222547. The next prime is 213222571. The reversal of 213222552 is 255222312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316488 + ... + 317160.

It is an arithmetic number, because the mean of its divisors is an integer number (8563170).

Almost surely, 2^213222552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213222552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274021440).

213222552 is an abundant number, since it is smaller than the sum of its proper divisors (334820328).

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

213222552 is a wasteful number, since it uses less digits than its factorization.

213222552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1028 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 213222552 is about 14602.1420346468. The cubic root of 213222552 is about 597.4171866342.

Adding to 213222552 its reverse (255222312), we get a palindrome (468444864).

The spelling of 213222552 in words is "two hundred thirteen million, two hundred twenty-two thousand, five hundred fifty-two".