221796648392 has 36 divisors (see below), whose sum is σ = 457142094465. Its totient is φ = 100809998080.

The previous prime is 221796648347. The next prime is 221796648401. The reversal of 221796648392 is 293846697122.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 219318002596 + 2478645796 = 468314^2 + 49786^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333014.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14645048 + ... + 14660184.

Almost surely, 2^221796648392 is an apocalyptic number.

221796648392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221796648392 is an abundant number, since it is smaller than the sum of its proper divisors (235345446073).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221796648392 is an frugal number, since it uses more digits than its factorization.

221796648392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302 (or 15150 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 59.

The spelling of 221796648392 in words is "two hundred twenty-one billion, seven hundred ninety-six million, six hundred forty-eight thousand, three hundred ninety-two".