2400222021 has 4 divisors (see below), whose sum is σ = 3200296032. Its totient is φ = 1600148012.

The previous prime is 2400221977. The next prime is 2400222059. The reversal of 2400222021 is 1202220042.

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 2400222021 - 2¹⁷ = 2400090949 is a prime.

It is a super-2 number, since 2×2400222021² = 11522131500186648882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400222821) 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, 400037001 + ... + 400037006.

It is an arithmetic number, because the mean of its divisors is an integer number (800074008).

Almost surely, 2^2400222021 is an apocalyptic number.

It is an amenable number.

2400222021 is a deficient number, since it is larger than the sum of its proper divisors (800074011).

2400222021 is an equidigital number, since it uses as much as digits as its factorization.

2400222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800074010.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2400222021 is about 48992.0607956024. The cubic root of 2400222021 is about 1338.9071844949.

Adding to 2400222021 its reverse (1202220042), we get a palindrome (3602442063).

The spelling of 2400222021 in words is "two billion, four hundred million, two hundred twenty-two thousand, twenty-one".