2213572421 has 2 divisors, whose sum is σ = 2213572422. Its totient is φ = 2213572420.

The previous prime is 2213572399. The next prime is 2213572423. The reversal of 2213572421 is 1242753122.

2213572421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2205335521 + 8236900 = 46961^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213572421 - 2²² = 2209378117 is a prime.

Together with 2213572423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2213572423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106786210 + 1106786211.

It is an arithmetic number, because the mean of its divisors is an integer number (1106786211).

Almost surely, 2^2213572421 is an apocalyptic number.

It is an amenable number.

2213572421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213572421 is an equidigital number, since it uses as much as digits as its factorization.

2213572421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 2213572421 is about 47048.6176311271. The cubic root of 2213572421 is about 1303.2605374810.

The spelling of 2213572421 in words is "two billion, two hundred thirteen million, five hundred seventy-two thousand, four hundred twenty-one".