31282494653981 has 4 divisors (see below), whose sum is σ = 31372129309500. Its totient is φ = 31192859998464.

The previous prime is 31282494653929. The next prime is 31282494654011. The reversal of 31282494653981 is 18935649428213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18031191079225 + 13251303574756 = 4246315^2 + 3640234^2 .

It is a cyclic number.

It is not a de Polignac number, because 31282494653981 - 2³⁴ = 31265314784797 is a prime.

It is a super-2 number, since 2×31282494653981² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31282494659981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44817327236 + ... + 44817327933.

It is an arithmetic number, because the mean of its divisors is an integer number (7843032327375).

Almost surely, 2^{31282494653981} is an apocalyptic number.

It is an amenable number.

31282494653981 is a deficient number, since it is larger than the sum of its proper divisors (89634655519).

31282494653981 is an equidigital number, since it uses as much as digits as its factorization.

31282494653981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89634655518.

The product of its digits is 89579520, while the sum is 65.

The spelling of 31282494653981 in words is "thirty-one trillion, two hundred eighty-two billion, four hundred ninety-four million, six hundred fifty-three thousand, nine hundred eighty-one".