81341475 has 12 divisors (see below), whose sum is σ = 134484696. Its totient is φ = 43382080.

The previous prime is 81341467. The next prime is 81341479. The reversal of 81341475 is 57414318.

It is not a de Polignac number, because 81341475 - 2³ = 81341467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81341479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542202 + ... + 542351.

It is an arithmetic number, because the mean of its divisors is an integer number (11207058).

Almost surely, 2^81341475 is an apocalyptic number.

81341475 is a deficient number, since it is larger than the sum of its proper divisors (53143221).

81341475 is a wasteful number, since it uses less digits than its factorization.

81341475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084566 (or 1084561 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 81341475 is about 9018.9508813387. The cubic root of 81341475 is about 433.2820337037.

The spelling of 81341475 in words is "eighty-one million, three hundred forty-one thousand, four hundred seventy-five".