81403341 has 16 divisors (see below), whose sum is σ = 111034560. Its totient is φ = 53032320.

The previous prime is 81403339. The next prime is 81403349. The reversal of 81403341 is 14330418.

It is not a de Polignac number, because 81403341 - 2¹ = 81403339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81403349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28465 + ... + 31193.

It is an arithmetic number, because the mean of its divisors is an integer number (6939660).

Almost surely, 2^81403341 is an apocalyptic number.

It is an amenable number.

81403341 is a deficient number, since it is larger than the sum of its proper divisors (29631219).

81403341 is a wasteful number, since it uses less digits than its factorization.

81403341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 81403341 is about 9022.3800075146. The cubic root of 81403341 is about 433.3918531750.

Adding to 81403341 its reverse (14330418), we get a palindrome (95733759).

The spelling of 81403341 in words is "eighty-one million, four hundred three thousand, three hundred forty-one".