81883131325 has 6 divisors (see below), whose sum is σ = 101535082874. Its totient is φ = 65506505040.

The previous prime is 81883131293. The next prime is 81883131349. The reversal of 81883131325 is 52313138818.

It can be written as a sum of positive squares in 3 ways, for example, as 22391531044 + 59491600281 = 149638^2 + 243909^2 .

It is not a de Polignac number, because 81883131325 - 2⁵ = 81883131293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1637662602 + ... + 1637662651.

Almost surely, 2^81883131325 is an apocalyptic number.

It is an amenable number.

81883131325 is a deficient number, since it is larger than the sum of its proper divisors (19651951549).

81883131325 is a wasteful number, since it uses less digits than its factorization.

81883131325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275325263 (or 3275325258 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The spelling of 81883131325 in words is "eighty-one billion, eight hundred eighty-three million, one hundred thirty-one thousand, three hundred twenty-five".