30223331981 has 2 divisors, whose sum is σ = 30223331982. Its totient is φ = 30223331980.

The previous prime is 30223331951. The next prime is 30223332023. The reversal of 30223331981 is 18913332203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21482764900 + 8740567081 = 146570^2 + 93491^2 .

It is a cyclic number.

It is not a de Polignac number, because 30223331981 - 2¹⁰ = 30223330957 is a prime.

It is a super-2 number, since 2×30223331981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30223331951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15111665990 + 15111665991.

It is an arithmetic number, because the mean of its divisors is an integer number (15111665991).

Almost surely, 2^30223331981 is an apocalyptic number.

It is an amenable number.

30223331981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30223331981 is an equidigital number, since it uses as much as digits as its factorization.

30223331981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 30223331981 in words is "thirty billion, two hundred twenty-three million, three hundred thirty-one thousand, nine hundred eighty-one".