42440311 has 4 divisors (see below), whose sum is σ = 43903800. Its totient is φ = 40976824.

The previous prime is 42440309. The next prime is 42440327. The reversal of 42440311 is 11304424.

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

It is a cyclic number.

It is not a de Polignac number, because 42440311 - 2¹ = 42440309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440351) 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, 731701 + ... + 731758.

It is an arithmetic number, because the mean of its divisors is an integer number (10975950).

Almost surely, 2^42440311 is an apocalyptic number.

42440311 is a deficient number, since it is larger than the sum of its proper divisors (1463489).

42440311 is a wasteful number, since it uses less digits than its factorization.

42440311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463488.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42440311 is about 6514.6228593833. The cubic root of 42440311 is about 348.8131527485.

Adding to 42440311 its reverse (11304424), we get a palindrome (53744735).

The spelling of 42440311 in words is "forty-two million, four hundred forty thousand, three hundred eleven".