2221351761 has 8 divisors (see below), whose sum is σ = 2963974464. Its totient is φ = 1479815120.

The previous prime is 2221351723. The next prime is 2221351763. The reversal of 2221351761 is 1671531222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221351761 - 2¹⁰ = 2221350737 is a prime.

It is a super-2 number, since 2×2221351761² = 9868807292195602242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221351763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266730 + ... + 274931.

It is an arithmetic number, because the mean of its divisors is an integer number (370496808).

Almost surely, 2^2221351761 is an apocalyptic number.

It is an amenable number.

2221351761 is a deficient number, since it is larger than the sum of its proper divisors (742622703).

2221351761 is a wasteful number, since it uses less digits than its factorization.

2221351761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543031.

The product of its digits is 5040, while the sum is 30.

The square root of 2221351761 is about 47131.2185393079. The cubic root of 2221351761 is about 1304.7854711139.

Adding to 2221351761 its reverse (1671531222), we get a palindrome (3892882983).

The spelling of 2221351761 in words is "two billion, two hundred twenty-one million, three hundred fifty-one thousand, seven hundred sixty-one".