213442044 has 24 divisors (see below), whose sum is σ = 498285648. Its totient is φ = 71111040.

The previous prime is 213442043. The next prime is 213442049. The reversal of 213442044 is 440244312.

It is a happy number.

It is a super-2 number, since 2×213442044² = 91115012293795872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213442043) 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, 31224 + ... + 37440.

It is an arithmetic number, because the mean of its divisors is an integer number (20761902).

Almost surely, 2^213442044 is an apocalyptic number.

It is an amenable number.

213442044 is an abundant number, since it is smaller than the sum of its proper divisors (284843604).

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

213442044 is a wasteful number, since it uses less digits than its factorization.

213442044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9085 (or 9083 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 213442044 is about 14609.6558481027. The cubic root of 213442044 is about 597.6221107428.

Adding to 213442044 its reverse (440244312), we get a palindrome (653686356).

The spelling of 213442044 in words is "two hundred thirteen million, four hundred forty-two thousand, forty-four".