2210897681 has 2 divisors, whose sum is σ = 2210897682. Its totient is φ = 2210897680.

The previous prime is 2210897659. The next prime is 2210897687. The reversal of 2210897681 is 1867980122.

2210897681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1740224656 + 470673025 = 41716^2 + 21695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2210897681 is a prime.

It is a super-2 number, since 2×2210897681² = 9776137111702355522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2210897687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105448840 + 1105448841.

It is an arithmetic number, because the mean of its divisors is an integer number (1105448841).

Almost surely, 2^2210897681 is an apocalyptic number.

It is an amenable number.

2210897681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210897681 is an equidigital number, since it uses as much as digits as its factorization.

2210897681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 2210897681 is about 47020.1837618698. The cubic root of 2210897681 is about 1302.7354002202.

The spelling of 2210897681 in words is "two billion, two hundred ten million, eight hundred ninety-seven thousand, six hundred eighty-one".