81014013 has 24 divisors (see below), whose sum is σ = 123043648. Its totient is φ = 53257824.

The previous prime is 81013949. The next prime is 81014029. The reversal of 81014013 is 31041018.

It is not a de Polignac number, because 81014013 - 2⁶ = 81013949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81014033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15456 + ... + 20022.

Almost surely, 2^81014013 is an apocalyptic number.

It is an amenable number.

81014013 is a deficient number, since it is larger than the sum of its proper divisors (42029635).

81014013 is an equidigital number, since it uses as much as digits as its factorization.

81014013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655 (or 4643 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 81014013 is about 9000.7784663328. The cubic root of 81014013 is about 432.6998205711.

The spelling of 81014013 in words is "eighty-one million, fourteen thousand, thirteen".