2147534381 has 2 divisors, whose sum is σ = 2147534382. Its totient is φ = 2147534380.

The previous prime is 2147534369. The next prime is 2147534383. The reversal of 2147534381 is 1834357412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1333345225 + 814189156 = 36515^2 + 28534^2 .

It is a cyclic number.

It is not a de Polignac number, because 2147534381 - 2¹⁰ = 2147533357 is a prime.

It is a super-2 number, since 2×2147534381² = 9223807835154106322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2147534383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2147534383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073767190 + 1073767191.

It is an arithmetic number, because the mean of its divisors is an integer number (1073767191).

Almost surely, 2^2147534381 is an apocalyptic number.

It is an amenable number.

2147534381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147534381 is an equidigital number, since it uses as much as digits as its factorization.

2147534381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 2147534381 is about 46341.4973970415. The cubic root of 2147534381 is about 1290.1693147551.

The spelling of 2147534381 in words is "two billion, one hundred forty-seven million, five hundred thirty-four thousand, three hundred eighty-one".