5651221565 has 8 divisors (see below), whose sum is σ = 7397962848. Its totient is φ = 4109979280.

The previous prime is 5651221531. The next prime is 5651221571.

5651221565 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5651221565 - 2²⁴ = 5634444349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51374687 + ... + 51374796.

It is an arithmetic number, because the mean of its divisors is an integer number (924745356).

Almost surely, 2^5651221565 is an apocalyptic number.

5651221565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5651221565 is a deficient number, since it is larger than the sum of its proper divisors (1746741283).

5651221565 is a wasteful number, since it uses less digits than its factorization.

5651221565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102749499.

The product of its digits is 90000, while the sum is 38.

The square root of 5651221565 is about 75174.6071822128. The cubic root of 5651221565 is about 1781.2058450694.

The spelling of 5651221565 in words is "five billion, six hundred fifty-one million, two hundred twenty-one thousand, five hundred sixty-five".