81419208 has 32 divisors (see below), whose sum is σ = 219206400. Its totient is φ = 25051968.

The previous prime is 81419207. The next prime is 81419209. The reversal of 81419208 is 80291418.

It is an interprime number because it is at equal distance from previous prime (81419207) and next prime (81419209).

It is not an unprimeable number, because it can be changed into a prime (81419207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130168 + ... + 130791.

It is an arithmetic number, because the mean of its divisors is an integer number (6850200).

Almost surely, 2^81419208 is an apocalyptic number.

It is an amenable number.

81419208 is an abundant number, since it is smaller than the sum of its proper divisors (137787192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81419208 is a wasteful number, since it uses less digits than its factorization.

81419208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260981 (or 260977 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 81419208 is about 9023.2592781101. The cubic root of 81419208 is about 433.4200100119.

The spelling of 81419208 in words is "eighty-one million, four hundred nineteen thousand, two hundred eight".