213042442 has 8 divisors (see below), whose sum is σ = 319630500. Its totient is φ = 106498944.

The previous prime is 213042433. The next prime is 213042443. The reversal of 213042442 is 244240312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 212897281 + 145161 = 14591^2 + 381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213042443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6234 + ... + 21562.

Almost surely, 2^213042442 is an apocalyptic number.

213042442 is a deficient number, since it is larger than the sum of its proper divisors (106588058).

213042442 is a wasteful number, since it uses less digits than its factorization.

213042442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22280.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 213042442 is about 14595.9734858625. The cubic root of 213042442 is about 597.2489256324.

Adding to 213042442 its reverse (244240312), we get a palindrome (457282754).

The spelling of 213042442 in words is "two hundred thirteen million, forty-two thousand, four hundred forty-two".