2247447421 has 4 divisors (see below), whose sum is σ = 2247757852. Its totient is φ = 2247136992.

The previous prime is 2247447383. The next prime is 2247447439. The reversal of 2247447421 is 1247447422.

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 1222551225 + 1024896196 = 34965^2 + 32014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2247447421 - 2²⁹ = 1710576509 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 (2227447421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144090 + ... + 158923.

It is an arithmetic number, because the mean of its divisors is an integer number (561939463).

Almost surely, 2^2247447421 is an apocalyptic number.

It is an amenable number.

2247447421 is a deficient number, since it is larger than the sum of its proper divisors (310431).

2247447421 is an equidigital number, since it uses as much as digits as its factorization.

2247447421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310430.

The product of its digits is 100352, while the sum is 37.

The square root of 2247447421 is about 47407.2507218041. The cubic root of 2247447421 is about 1309.8749800082.

Subtracting from 2247447421 its reverse (1247447422), we obtain a palindrome (999999999).

The spelling of 2247447421 in words is "two billion, two hundred forty-seven million, four hundred forty-seven thousand, four hundred twenty-one".