412215985981 has 2 divisors, whose sum is σ = 412215985982. Its totient is φ = 412215985980.

The previous prime is 412215985969. The next prime is 412215986011. The reversal of 412215985981 is 189589512214.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319032928900 + 93183057081 = 564830^2 + 305259^2 .

It is a cyclic number.

It is not a de Polignac number, because 412215985981 - 2⁵ = 412215985949 is a prime.

It is a super-2 number, since 2×412215985981² (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 (412215985921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206107992990 + 206107992991.

It is an arithmetic number, because the mean of its divisors is an integer number (206107992991).

Almost surely, 2^412215985981 is an apocalyptic number.

It is an amenable number.

412215985981 is a deficient number, since it is larger than the sum of its proper divisors (1).

412215985981 is an equidigital number, since it uses as much as digits as its factorization.

412215985981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 55.

The spelling of 412215985981 in words is "four hundred twelve billion, two hundred fifteen million, nine hundred eighty-five thousand, nine hundred eighty-one".