2102993281 has 2 divisors, whose sum is σ = 2102993282. Its totient is φ = 2102993280.

The previous prime is 2102993273. The next prime is 2102993369. The reversal of 2102993281 is 1823992012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1813993281 + 289000000 = 42591^2 + 17000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102993281 - 2³ = 2102993273 is a prime.

It is a super-2 number, since 2×2102993281² = 8845161479862289922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102993281.

It is not a weakly prime, because it can be changed into another prime (2102993681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051496640 + 1051496641.

It is an arithmetic number, because the mean of its divisors is an integer number (1051496641).

Almost surely, 2^2102993281 is an apocalyptic number.

It is an amenable number.

2102993281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102993281 is an equidigital number, since it uses as much as digits as its factorization.

2102993281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2102993281 is about 45858.4046931421. The cubic root of 2102993281 is about 1281.1873099892.

The spelling of 2102993281 in words is "two billion, one hundred two million, nine hundred ninety-three thousand, two hundred eighty-one".