81050733 has 8 divisors (see below), whose sum is σ = 120075200. Its totient is φ = 54033804.

The previous prime is 81050699. The next prime is 81050777. The reversal of 81050733 is 33705018.

It is not a de Polignac number, because 81050733 - 2¹³ = 81042541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3001879 = 81050733 / (8 + 1 + 0 + 5 + 0 + 7 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81050697 and 81050706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81050933) 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, 1500913 + ... + 1500966.

It is an arithmetic number, because the mean of its divisors is an integer number (15009400).

Almost surely, 2^81050733 is an apocalyptic number.

It is an amenable number.

81050733 is a deficient number, since it is larger than the sum of its proper divisors (39024467).

81050733 is a wasteful number, since it uses less digits than its factorization.

81050733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001888 (or 3001882 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 81050733 is about 9002.8180588080. The cubic root of 81050733 is about 432.7651851374.

The spelling of 81050733 in words is "eighty-one million, fifty thousand, seven hundred thirty-three".