2031528122881 has 4 divisors (see below), whose sum is σ = 2078772962992. Its totient is φ = 1984283282772.

The previous prime is 2031528122849. The next prime is 2031528122917. The reversal of 2031528122881 is 1882218251302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2031528122881 - 2⁵ = 2031528122849 is a prime.

It is a super-2 number, since 2×2031528122881² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 47244840067 = 2031528122881 / (2 + 0 + 3 + 1 + 5 + 2 + 8 + 1 + 2 + 2 + 8 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031528122831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23622419991 + ... + 23622420076.

It is an arithmetic number, because the mean of its divisors is an integer number (519693240748).

Almost surely, 2^{2031528122881} is an apocalyptic number.

It is an amenable number.

2031528122881 is a deficient number, since it is larger than the sum of its proper divisors (47244840111).

2031528122881 is an equidigital number, since it uses as much as digits as its factorization.

2031528122881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47244840110.

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 2031528122881 in words is "two trillion, thirty-one billion, five hundred twenty-eight million, one hundred twenty-two thousand, eight hundred eighty-one".