73081751 has 4 divisors (see below), whose sum is σ = 73120104. Its totient is φ = 73043400.

The previous prime is 73081747. The next prime is 73081781. The reversal of 73081751 is 15718037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15718037 = 1091 ⋅14407.

It is a cyclic number.

It is not a de Polignac number, because 73081751 - 2² = 73081747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73081781) 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, 16160 + ... + 20181.

It is an arithmetic number, because the mean of its divisors is an integer number (18280026).

Almost surely, 2^73081751 is an apocalyptic number.

73081751 is a deficient number, since it is larger than the sum of its proper divisors (38353).

73081751 is a wasteful number, since it uses less digits than its factorization.

73081751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38352.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 73081751 is about 8548.7865220743. The cubic root of 73081751 is about 418.0898729244.

Adding to 73081751 its reverse (15718037), we get a palindrome (88799788).

The spelling of 73081751 in words is "seventy-three million, eighty-one thousand, seven hundred fifty-one".