213433242 has 64 divisors (see below), whose sum is σ = 485388288. Its totient is φ = 61992000.

The previous prime is 213433237. The next prime is 213433291. The reversal of 213433242 is 242334312.

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, 172767 + ... + 173997.

It is an arithmetic number, because the mean of its divisors is an integer number (7584192).

Almost surely, 2^213433242 is an apocalyptic number.

213433242 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 213433242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242694144).

213433242 is an abundant number, since it is smaller than the sum of its proper divisors (271955046).

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

213433242 is a wasteful number, since it uses less digits than its factorization.

213433242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355.

The product of its digits is 3456, while the sum is 24.

The square root of 213433242 is about 14609.3546058681. The cubic root of 213433242 is about 597.6138956445.

Adding to 213433242 its reverse (242334312), we get a palindrome (455767554).

The spelling of 213433242 in words is "two hundred thirteen million, four hundred thirty-three thousand, two hundred forty-two".