2221481551 has 2 divisors, whose sum is σ = 2221481552. Its totient is φ = 2221481550.

The previous prime is 2221481543. The next prime is 2221481573. The reversal of 2221481551 is 1551841222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221481551 - 2³ = 2221481543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221481051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110740775 + 1110740776.

It is an arithmetic number, because the mean of its divisors is an integer number (1110740776).

Almost surely, 2^2221481551 is an apocalyptic number.

2221481551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221481551 is an equidigital number, since it uses as much as digits as its factorization.

2221481551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 31.

The square root of 2221481551 is about 47132.5954197305. The cubic root of 2221481551 is about 1304.8108827891.

The spelling of 2221481551 in words is "two billion, two hundred twenty-one million, four hundred eighty-one thousand, five hundred fifty-one".