81341472 has 48 divisors (see below), whose sum is σ = 214008480. Its totient is φ = 27052032.

The previous prime is 81341467. The next prime is 81341479. The reversal of 81341472 is 27414318.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 63979 + ... + 65237.

It is an arithmetic number, because the mean of its divisors is an integer number (4458510).

Almost surely, 2^81341472 is an apocalyptic number.

It is an amenable number.

81341472 is an abundant number, since it is smaller than the sum of its proper divisors (132667008).

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

81341472 is a wasteful number, since it uses less digits than its factorization.

81341472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1937 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 81341472 is about 9018.9507150222. The cubic root of 81341472 is about 433.2820283770.

The spelling of 81341472 in words is "eighty-one million, three hundred forty-one thousand, four hundred seventy-two".