213204042 has 16 divisors (see below), whose sum is σ = 473786880. Its totient is φ = 71067996.

The previous prime is 213204041. The next prime is 213204053. The reversal of 213204042 is 240402312.

213204042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (213204041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974058 + ... + 1974165.

It is an arithmetic number, because the mean of its divisors is an integer number (29611680).

Almost surely, 2^213204042 is an apocalyptic number.

213204042 is an abundant number, since it is smaller than the sum of its proper divisors (260582838).

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

213204042 is a wasteful number, since it uses less digits than its factorization.

213204042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948234 (or 3948228 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 213204042 is about 14601.5082097707. The cubic root of 213204042 is about 597.3998987316.

Adding to 213204042 its reverse (240402312), we get a palindrome (453606354).

The spelling of 213204042 in words is "two hundred thirteen million, two hundred four thousand, forty-two".