2042343521 has 4 divisors (see below), whose sum is σ = 2042563092. Its totient is φ = 2042123952.

The previous prime is 2042343509. The next prime is 2042343553. The reversal of 2042343521 is 1253432402.

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 1843843600 + 198499921 = 42940^2 + 14089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2042343521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2042345521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95186 + ... + 114651.

It is an arithmetic number, because the mean of its divisors is an integer number (510640773).

Almost surely, 2^2042343521 is an apocalyptic number.

It is an amenable number.

2042343521 is a deficient number, since it is larger than the sum of its proper divisors (219571).

2042343521 is an equidigital number, since it uses as much as digits as its factorization.

2042343521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219570.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2042343521 is about 45192.2949295563. The cubic root of 2042343521 is about 1268.7506097985.

Adding to 2042343521 its reverse (1253432402), we get a palindrome (3295775923).

The spelling of 2042343521 in words is "two billion, forty-two million, three hundred forty-three thousand, five hundred twenty-one".