210653014981 has 2 divisors, whose sum is σ = 210653014982. Its totient is φ = 210653014980.

The previous prime is 210653014961. The next prime is 210653015071. The reversal of 210653014981 is 189410356012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210598388100 + 54626881 = 458910^2 + 7391^2 .

It is a cyclic number.

It is not a de Polignac number, because 210653014981 - 2⁹ = 210653014469 is a prime.

It is a super-2 number, since 2×210653014981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210653014961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105326507490 + 105326507491.

It is an arithmetic number, because the mean of its divisors is an integer number (105326507491).

Almost surely, 2^210653014981 is an apocalyptic number.

It is an amenable number.

210653014981 is a deficient number, since it is larger than the sum of its proper divisors (1).

210653014981 is an equidigital number, since it uses as much as digits as its factorization.

210653014981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 210653014981 in words is "two hundred ten billion, six hundred fifty-three million, fourteen thousand, nine hundred eighty-one".