2240624021 has 4 divisors (see below), whose sum is σ = 2372425452. Its totient is φ = 2108822592.

The previous prime is 2240624017. The next prime is 2240624053. The reversal of 2240624021 is 1204260422.

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 738208900 + 1502415121 = 27170^2 + 38761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240624021 - 2² = 2240624017 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 (2240624011) 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, 65900690 + ... + 65900723.

It is an arithmetic number, because the mean of its divisors is an integer number (593106363).

Almost surely, 2^2240624021 is an apocalyptic number.

It is an amenable number.

2240624021 is a deficient number, since it is larger than the sum of its proper divisors (131801431).

2240624021 is a wasteful number, since it uses less digits than its factorization.

2240624021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131801430.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2240624021 is about 47335.2302307700. The cubic root of 2240624021 is about 1308.5480136321.

Adding to 2240624021 its reverse (1204260422), we get a palindrome (3444884443).

The spelling of 2240624021 in words is "two billion, two hundred forty million, six hundred twenty-four thousand, twenty-one".