42415023322981 has 2 divisors, whose sum is σ = 42415023322982. Its totient is φ = 42415023322980.

The previous prime is 42415023322979. The next prime is 42415023323003. The reversal of 42415023322981 is 18922332051424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40793654034081 + 1621369288900 = 6386991^2 + 1273330^2 .

It is a cyclic number.

It is not a de Polignac number, because 42415023322981 - 2¹ = 42415023322979 is a prime.

It is a super-2 number, since 2×42415023322981² (a number of 28 digits) contains 22 as substring.

Together with 42415023322979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42415023322901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21207511661490 + 21207511661491.

It is an arithmetic number, because the mean of its divisors is an integer number (21207511661491).

Almost surely, 2^{42415023322981} is an apocalyptic number.

It is an amenable number.

42415023322981 is a deficient number, since it is larger than the sum of its proper divisors (1).

42415023322981 is an equidigital number, since it uses as much as digits as its factorization.

42415023322981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 42415023322981 in words is "forty-two trillion, four hundred fifteen billion, twenty-three million, three hundred twenty-two thousand, nine hundred eighty-one".