2230400021 has 4 divisors (see below), whose sum is σ = 2230668000. Its totient is φ = 2230132044.

The previous prime is 2230399991. The next prime is 2230400047. The reversal of 2230400021 is 1200040322.

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 a de Polignac number, because none of the positive numbers 2^k-2230400021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2230399969 and 2230400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2230100021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121091 + ... + 138288.

It is an arithmetic number, because the mean of its divisors is an integer number (557667000).

Almost surely, 2^2230400021 is an apocalyptic number.

It is an amenable number.

2230400021 is a deficient number, since it is larger than the sum of its proper divisors (267979).

2230400021 is an equidigital number, since it uses as much as digits as its factorization.

2230400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267978.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2230400021 is about 47227.1110803953. Note that the first 3 decimals coincide. The cubic root of 2230400021 is about 1306.5546707931.

Adding to 2230400021 its reverse (1200040322), we get a palindrome (3430440343).

The spelling of 2230400021 in words is "two billion, two hundred thirty million, four hundred thousand, twenty-one".