81514419 has 16 divisors (see below), whose sum is σ = 125376768. Its totient is φ = 46143072.

The previous prime is 81514409. The next prime is 81514493. The reversal of 81514419 is 91441518.

It is not a de Polignac number, because 81514419 - 2⁵ = 81514387 is a prime.

It is a super-2 number, since 2×81514419² = 13289201009815122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81514419.

It is not an unprimeable number, because it can be changed into a prime (81514409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15892 + ... + 20385.

It is an arithmetic number, because the mean of its divisors is an integer number (7836048).

Almost surely, 2^81514419 is an apocalyptic number.

81514419 is a deficient number, since it is larger than the sum of its proper divisors (43862349).

81514419 is a wasteful number, since it uses less digits than its factorization.

81514419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36394.

The product of its digits is 5760, while the sum is 33.

The square root of 81514419 is about 9028.5336018647. The cubic root of 81514419 is about 433.5888902165.

The spelling of 81514419 in words is "eighty-one million, five hundred fourteen thousand, four hundred nineteen".