221823290312 has 36 divisors (see below), whose sum is σ = 450408633795. Its totient is φ = 102371987328.

The previous prime is 221823290233. The next prime is 221823290321. The reversal of 221823290312 is 213092328122.

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 5 ways, for example, as 9234056836 + 212589233476 = 96094^2 + 461074^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333034.

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, 17311364 + ... + 17324172.

Almost surely, 2^221823290312 is an apocalyptic number.

It is an amenable number.

221823290312 is an abundant number, since it is smaller than the sum of its proper divisors (228585343483).

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

221823290312 is an frugal number, since it uses more digits than its factorization.

221823290312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650 (or 12824 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 221823290312 in words is "two hundred twenty-one billion, eight hundred twenty-three million, two hundred ninety thousand, three hundred twelve".