83131381 has 2 divisors, whose sum is σ = 83131382. Its totient is φ = 83131380.

The previous prime is 83131369. The next prime is 83131393. The reversal of 83131381 is 18313138.

It is a balanced prime because it is at equal distance from previous prime (83131369) and next prime (83131393).

It can be written as a sum of positive squares in only one way, i.e., 71673156 + 11458225 = 8466^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 83131381 - 2⁷ = 83131253 is a prime.

It is a super-2 number, since 2×83131381² = 13821653013934322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83131331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41565690 + 41565691.

It is an arithmetic number, because the mean of its divisors is an integer number (41565691).

Almost surely, 2^83131381 is an apocalyptic number.

It is an amenable number.

83131381 is a deficient number, since it is larger than the sum of its proper divisors (1).

83131381 is an equidigital number, since it uses as much as digits as its factorization.

83131381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 83131381 is about 9117.6411971518. The cubic root of 83131381 is about 436.4371037273.

The spelling of 83131381 in words is "eighty-three million, one hundred thirty-one thousand, three hundred eighty-one".