2042240521 has 4 divisors (see below), whose sum is σ = 2071004544. Its totient is φ = 2013476500.

The previous prime is 2042240513. The next prime is 2042240527. The reversal of 2042240521 is 1250422402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2042240521 - 2³ = 2042240513 is a prime.

It is a super-2 number, since 2×2042240521² = 8341492691228702882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2042240492 and 2042240501.

It is not an unprimeable number, because it can be changed into a prime (2042240527) 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, 14381905 + ... + 14382046.

It is an arithmetic number, because the mean of its divisors is an integer number (517751136).

Almost surely, 2^2042240521 is an apocalyptic number.

It is an amenable number.

2042240521 is a deficient number, since it is larger than the sum of its proper divisors (28764023).

2042240521 is an equidigital number, since it uses as much as digits as its factorization.

2042240521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28764022.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2042240521 is about 45191.1553403982. The cubic root of 2042240521 is about 1268.7292807863.

Adding to 2042240521 its reverse (1250422402), we get a palindrome (3292662923).

The spelling of 2042240521 in words is "two billion, forty-two million, two hundred forty thousand, five hundred twenty-one".