9471221761 has 4 divisors (see below), whose sum is σ = 9471494592. Its totient is φ = 9470948932.

The previous prime is 9471221731. The next prime is 9471221843. The reversal of 9471221761 is 1671221749.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9471221761 - 2⁵ = 9471221729 is a prime.

It is a super-2 number, since 2×9471221761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9471221731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75181 + ... + 156826.

It is an arithmetic number, because the mean of its divisors is an integer number (2367873648).

Almost surely, 2^9471221761 is an apocalyptic number.

It is an amenable number.

9471221761 is a deficient number, since it is larger than the sum of its proper divisors (272831).

9471221761 is a wasteful number, since it uses less digits than its factorization.

9471221761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272830.

The product of its digits is 42336, while the sum is 40.

The square root of 9471221761 is about 97320.2022244097. The cubic root of 9471221761 is about 2115.7710405369.

The spelling of 9471221761 in words is "nine billion, four hundred seventy-one million, two hundred twenty-one thousand, seven hundred sixty-one".