81241338 has 8 divisors (see below), whose sum is σ = 162482688. Its totient is φ = 27080444.

The previous prime is 81241337. The next prime is 81241343. The reversal of 81241338 is 83314218.

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

81241338 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81241331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6770106 + ... + 6770117.

It is an arithmetic number, because the mean of its divisors is an integer number (20310336).

Almost surely, 2^81241338 is an apocalyptic number.

81241338 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.

81241338 is a wasteful number, since it uses less digits than its factorization.

81241338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13540228.

The product of its digits is 4608, while the sum is 30.

The square root of 81241338 is about 9013.3976945434. The cubic root of 81241338 is about 433.1041606093.

The spelling of 81241338 in words is "eighty-one million, two hundred forty-one thousand, three hundred thirty-eight".