223221031993 has 2 divisors, whose sum is σ = 223221031994. Its totient is φ = 223221031992.

The previous prime is 223221031937. The next prime is 223221032029. The reversal of 223221031993 is 399130122322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217009700649 + 6211331344 = 465843^2 + 78812^2 .

It is a cyclic number.

It is not a de Polignac number, because 223221031993 - 2¹³ = 223221023801 is a prime.

It is a super-3 number, since 3×223221031993³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (223221031903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111610515996 + 111610515997.

It is an arithmetic number, because the mean of its divisors is an integer number (111610515997).

Almost surely, 2^223221031993 is an apocalyptic number.

It is an amenable number.

223221031993 is a deficient number, since it is larger than the sum of its proper divisors (1).

223221031993 is an equidigital number, since it uses as much as digits as its factorization.

223221031993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 223221031993 in words is "two hundred twenty-three billion, two hundred twenty-one million, thirty-one thousand, nine hundred ninety-three".