243216402 has 64 divisors (see below), whose sum is σ = 573640704. Its totient is φ = 67775040.

The previous prime is 243216377. The next prime is 243216419. The reversal of 243216402 is 204612342.

243216402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400383 + ... + 400989.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^243216402 is an apocalyptic number.

243216402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243216402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286820352).

243216402 is an abundant number, since it is smaller than the sum of its proper divisors (330424302).

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

243216402 is a wasteful number, since it uses less digits than its factorization.

243216402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103.

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

The square root of 243216402 is about 15595.3968208571. The cubic root of 243216402 is about 624.2103324070.

Adding to 243216402 its reverse (204612342), we get a palindrome (447828744).

The spelling of 243216402 in words is "two hundred forty-three million, two hundred sixteen thousand, four hundred two".