31742940281 has 12 divisors (see below), whose sum is σ = 34591495212. Its totient is φ = 29114519616.

The previous prime is 31742940227. The next prime is 31742940353. The reversal of 31742940281 is 18204924713.

It can be written as a sum of positive squares in 6 ways, for example, as 10305295225 + 21437645056 = 101515^2 + 146416^2 .

It is not a de Polignac number, because 31742940281 - 2⁶ = 31742940217 is a prime.

It is a super-2 number, since 2×31742940281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31742942281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 571646 + ... + 624711.

It is an arithmetic number, because the mean of its divisors is an integer number (2882624601).

Almost surely, 2^31742940281 is an apocalyptic number.

It is an amenable number.

31742940281 is a deficient number, since it is larger than the sum of its proper divisors (2848554931).

31742940281 is a wasteful number, since it uses less digits than its factorization.

31742940281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196540 (or 1196527 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 31742940281 in words is "thirty-one billion, seven hundred forty-two million, nine hundred forty thousand, two hundred eighty-one".