31054880281 has 4 divisors (see below), whose sum is σ = 31060555812. Its totient is φ = 31049204752.

The previous prime is 31054880257. The next prime is 31054880333. The reversal of 31054880281 is 18208845013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18208845013 = 2297 ⋅7927229.

It can be written as a sum of positive squares in 2 ways, for example, as 20798254656 + 10256625625 = 144216^2 + 101275^2 .

It is a cyclic number.

It is not a de Polignac number, because 31054880281 - 2¹⁵ = 31054847513 is a prime.

It is a super-2 number, since 2×31054880281² (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 (31054880221) 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 3 ways as a sum of consecutive naturals, for example, 2829550 + ... + 2840503.

It is an arithmetic number, because the mean of its divisors is an integer number (7765138953).

Almost surely, 2^31054880281 is an apocalyptic number.

It is an amenable number.

31054880281 is a deficient number, since it is larger than the sum of its proper divisors (5675531).

31054880281 is an equidigital number, since it uses as much as digits as its factorization.

31054880281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675530.

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 31054880281 in words is "thirty-one billion, fifty-four million, eight hundred eighty thousand, two hundred eighty-one".