96221721 has 4 divisors (see below), whose sum is σ = 128295632. Its totient is φ = 64147812.

The previous prime is 96221707. The next prime is 96221771. The reversal of 96221721 is 12712269.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12712269 = 3 ⋅4237423.

It is not a de Polignac number, because 96221721 - 2¹³ = 96213529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (96221771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16036951 + ... + 16036956.

It is an arithmetic number, because the mean of its divisors is an integer number (32073908).

Almost surely, 2^96221721 is an apocalyptic number.

It is an amenable number.

96221721 is a deficient number, since it is larger than the sum of its proper divisors (32073911).

96221721 is a wasteful number, since it uses less digits than its factorization.

96221721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32073910.

The product of its digits is 3024, while the sum is 30.

The square root of 96221721 is about 9809.2670980048. The cubic root of 96221721 is about 458.2379359654.

The spelling of 96221721 in words is "ninety-six million, two hundred twenty-one thousand, seven hundred twenty-one".