3040442021 has 4 divisors (see below), whose sum is σ = 3045042444. Its totient is φ = 3035841600.

The previous prime is 3040442003. The next prime is 3040442029. The reversal of 3040442021 is 1202440403.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2837692900 + 202749121 = 53270^2 + 14239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3040442021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3040441984 and 3040442002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3040442029) 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, 2299220 + ... + 2300541.

It is an arithmetic number, because the mean of its divisors is an integer number (761260611).

Almost surely, 2^3040442021 is an apocalyptic number.

It is an amenable number.

3040442021 is a deficient number, since it is larger than the sum of its proper divisors (4600423).

3040442021 is an equidigital number, since it uses as much as digits as its factorization.

3040442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600422.

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

The square root of 3040442021 is about 55140.2033093822. The cubic root of 3040442021 is about 1448.7014964097.

Adding to 3040442021 its reverse (1202440403), we get a palindrome (4242882424).

The spelling of 3040442021 in words is "three billion, forty million, four hundred forty-two thousand, twenty-one".