353219111981 has 2 divisors, whose sum is σ = 353219111982. Its totient is φ = 353219111980.

The previous prime is 353219111953. The next prime is 353219112017. The reversal of 353219111981 is 189111912353.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325709904100 + 27509207881 = 570710^2 + 165859^2 .

It is a cyclic number.

It is not a de Polignac number, because 353219111981 - 2³⁸ = 78341205037 is a prime.

It is a super-2 number, since 2×353219111981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353219111911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176609555990 + 176609555991.

It is an arithmetic number, because the mean of its divisors is an integer number (176609555991).

Almost surely, 2^353219111981 is an apocalyptic number.

It is an amenable number.

353219111981 is a deficient number, since it is larger than the sum of its proper divisors (1).

353219111981 is an equidigital number, since it uses as much as digits as its factorization.

353219111981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 44.

The spelling of 353219111981 in words is "three hundred fifty-three billion, two hundred nineteen million, one hundred eleven thousand, nine hundred eighty-one".