81475194 has 8 divisors (see below), whose sum is σ = 162950400. Its totient is φ = 27158396.

The previous prime is 81475189. The next prime is 81475201. The reversal of 81475194 is 49157418.

It is a sphenic number, since it is the product of 3 distinct primes.

81475194 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6789594 + ... + 6789605.

It is an arithmetic number, because the mean of its divisors is an integer number (20368800).

Almost surely, 2^81475194 is an apocalyptic number.

81475194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81475194 is a wasteful number, since it uses less digits than its factorization.

81475194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13579204.

The product of its digits is 40320, while the sum is 39.

The square root of 81475194 is about 9026.3610608041. The cubic root of 81475194 is about 433.5193309361.

The spelling of 81475194 in words is "eighty-one million, four hundred seventy-five thousand, one hundred ninety-four".