240474427981 has 2 divisors, whose sum is σ = 240474427982. Its totient is φ = 240474427980.

The previous prime is 240474427967. The next prime is 240474428009. The reversal of 240474427981 is 189724474042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208058225956 + 32416202025 = 456134^2 + 180045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240474427981 is a prime.

It is a super-2 number, since 2×240474427981² (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 (240474427901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120237213990 + 120237213991.

It is an arithmetic number, because the mean of its divisors is an integer number (120237213991).

Almost surely, 2^240474427981 is an apocalyptic number.

It is an amenable number.

240474427981 is a deficient number, since it is larger than the sum of its proper divisors (1).

240474427981 is an equidigital number, since it uses as much as digits as its factorization.

240474427981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 240474427981 in words is "two hundred forty billion, four hundred seventy-four million, four hundred twenty-seven thousand, nine hundred eighty-one".