81235043 has 2 divisors, whose sum is σ = 81235044. Its totient is φ = 81235042.

The previous prime is 81235031. The next prime is 81235067. The reversal of 81235043 is 34053218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81235043 - 2²² = 77040739 is a prime.

It is a super-2 number, since 2×81235043² = 13198264422423698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81235543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40617521 + 40617522.

It is an arithmetic number, because the mean of its divisors is an integer number (40617522).

Almost surely, 2^81235043 is an apocalyptic number.

81235043 is a deficient number, since it is larger than the sum of its proper divisors (1).

81235043 is an equidigital number, since it uses as much as digits as its factorization.

81235043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 81235043 is about 9013.0484853905. The cubic root of 81235043 is about 433.0929739353.

The spelling of 81235043 in words is "eighty-one million, two hundred thirty-five thousand, forty-three".