42811334281 has 3 divisors (see below), whose sum is σ = 42811541191. Its totient is φ = 42811127372.

The previous prime is 42811334249. The next prime is 42811334287. The reversal of 42811334281 is 18243311824.

The square root of 42811334281 is 206909.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 16716162681 + 26095171600 = 129291^2 + 161540^2 .

It is not a de Polignac number, because 42811334281 - 2⁵ = 42811334249 is a prime.

It is a super-2 number, since 2×42811334281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42811334281.

It is not an unprimeable number, because it can be changed into a prime (42811334287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 103455 + ... + 310363.

Almost surely, 2^42811334281 is an apocalyptic number.

42811334281 is the 206909-th square number.

42811334281 is the 103455-th centered octagonal number.

It is an amenable number.

42811334281 is a deficient number, since it is larger than the sum of its proper divisors (206910).

42811334281 is an frugal number, since it uses more digits than its factorization.

42811334281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413818 (or 206909 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The spelling of 42811334281 in words is "forty-two billion, eight hundred eleven million, three hundred thirty-four thousand, two hundred eighty-one".