216342552 has 128 divisors (see below), whose sum is σ = 595353600. Its totient is φ = 65318400.

The previous prime is 216342547. The next prime is 216342559. The reversal of 216342552 is 255243612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216342559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 798177 + ... + 798447.

It is an arithmetic number, because the mean of its divisors is an integer number (4651200).

Almost surely, 2^216342552 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 216342552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297676800).

216342552 is an abundant number, since it is smaller than the sum of its proper divisors (379011048).

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

216342552 is a wasteful number, since it uses less digits than its factorization.

216342552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 373 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 216342552 is about 14708.5876956287. The cubic root of 216342552 is about 600.3170102558.

The spelling of 216342552 in words is "two hundred sixteen million, three hundred forty-two thousand, five hundred fifty-two".