40213442 has 4 divisors (see below), whose sum is σ = 60320166. Its totient is φ = 20106720.

The previous prime is 40213441. The next prime is 40213447. The reversal of 40213442 is 24431204.

40213442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39175081 + 1038361 = 6259^2 + 1019^2 .

It is not an unprimeable number, because it can be changed into a prime (40213441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10053359 + ... + 10053362.

Almost surely, 2^40213442 is an apocalyptic number.

40213442 is a deficient number, since it is larger than the sum of its proper divisors (20106724).

40213442 is a wasteful number, since it uses less digits than its factorization.

40213442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20106723.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40213442 is about 6341.4069416810. The cubic root of 40213442 is about 342.6024116997.

Adding to 40213442 its reverse (24431204), we get a palindrome (64644646).

The spelling of 40213442 in words is "forty million, two hundred thirteen thousand, four hundred forty-two".