2151281302369 has 2 divisors, whose sum is σ = 2151281302370. Its totient is φ = 2151281302368.

The previous prime is 2151281302349. The next prime is 2151281302393. The reversal of 2151281302369 is 9632031821512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1411612500769 + 739668801600 = 1188113^2 + 860040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151281302369 - 2³¹ = 2149133818721 is a prime.

It is a super-2 number, since 2×2151281302369² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2151281302349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075640651184 + 1075640651185.

It is an arithmetic number, because the mean of its divisors is an integer number (1075640651185).

Almost surely, 2^{2151281302369} is an apocalyptic number.

It is an amenable number.

2151281302369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151281302369 is an equidigital number, since it uses as much as digits as its factorization.

2151281302369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 2151281302369 in words is "two trillion, one hundred fifty-one billion, two hundred eighty-one million, three hundred two thousand, three hundred sixty-nine".