30215104451981 has 2 divisors, whose sum is σ = 30215104451982. Its totient is φ = 30215104451980.

The previous prime is 30215104451969. The next prime is 30215104452017. The reversal of 30215104451981 is 18915440151203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30166084277956 + 49020174025 = 5492366^2 + 221405^2 .

It is a cyclic number.

It is not a de Polignac number, because 30215104451981 - 2¹⁴ = 30215104435597 is a prime.

It is a super-2 number, since 2×30215104451981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30215104451381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15107552225990 + 15107552225991.

It is an arithmetic number, because the mean of its divisors is an integer number (15107552225991).

Almost surely, 2^{30215104451981} is an apocalyptic number.

It is an amenable number.

30215104451981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30215104451981 is an equidigital number, since it uses as much as digits as its factorization.

30215104451981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 44.

The spelling of 30215104451981 in words is "thirty trillion, two hundred fifteen billion, one hundred four million, four hundred fifty-one thousand, nine hundred eighty-one".