2221650551 has 4 divisors (see below), whose sum is σ = 2230946400. Its totient is φ = 2212354704.

The previous prime is 2221650517. The next prime is 2221650611. The reversal of 2221650551 is 1550561222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221650551 - 2¹⁰ = 2221649527 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 (2221650511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4647566 + ... + 4648043.

It is an arithmetic number, because the mean of its divisors is an integer number (557736600).

Almost surely, 2^2221650551 is an apocalyptic number.

2221650551 is a deficient number, since it is larger than the sum of its proper divisors (9295849).

2221650551 is an equidigital number, since it uses as much as digits as its factorization.

2221650551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295848.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2221650551 is about 47134.3882001241. The cubic root of 2221650551 is about 1304.8439699342.

The spelling of 2221650551 in words is "two billion, two hundred twenty-one million, six hundred fifty thousand, five hundred fifty-one".