2221624501 has 2 divisors, whose sum is σ = 2221624502. Its totient is φ = 2221624500.

The previous prime is 2221624499. The next prime is 2221624553. The reversal of 2221624501 is 1054261222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2132038276 + 89586225 = 46174^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221624501 - 2¹ = 2221624499 is a prime.

Together with 2221624499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221604501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110812250 + 1110812251.

It is an arithmetic number, because the mean of its divisors is an integer number (1110812251).

Almost surely, 2^2221624501 is an apocalyptic number.

It is an amenable number.

2221624501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221624501 is an equidigital number, since it uses as much as digits as its factorization.

2221624501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2221624501 is about 47134.1118617928. Note that the first 3 decimals coincide. The cubic root of 2221624501 is about 1304.8388699245.

Adding to 2221624501 its reverse (1054261222), we get a palindrome (3275885723).

The spelling of 2221624501 in words is "two billion, two hundred twenty-one million, six hundred twenty-four thousand, five hundred one".