81475141 has 8 divisors (see below), whose sum is σ = 89052768. Its totient is φ = 73926000.

The previous prime is 81475129. The next prime is 81475157. The reversal of 81475141 is 14157418.

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

It is a cyclic number.

It is not a de Polignac number, because 81475141 - 2⁵ = 81475109 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 (81475171) 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, 895 + ... + 12796.

It is an arithmetic number, because the mean of its divisors is an integer number (11131596).

Almost surely, 2^81475141 is an apocalyptic number.

It is an amenable number.

81475141 is a deficient number, since it is larger than the sum of its proper divisors (7577627).

81475141 is a wasteful number, since it uses less digits than its factorization.

81475141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14243.

The product of its digits is 4480, while the sum is 31.

The square root of 81475141 is about 9026.3581249583. The cubic root of 81475141 is about 433.5192369339.

The spelling of 81475141 in words is "eighty-one million, four hundred seventy-five thousand, one hundred forty-one".