73071231 has 4 divisors (see below), whose sum is σ = 97428312. Its totient is φ = 48714152.

The previous prime is 73071227. The next prime is 73071289. The reversal of 73071231 is 13217037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13217037 = 3 ⋅4405679.

It is a cyclic number.

It is not a de Polignac number, because 73071231 - 2² = 73071227 is a prime.

It is a super-2 number, since 2×73071231² = 10678809599710722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73071211) 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, 12178536 + ... + 12178541.

It is an arithmetic number, because the mean of its divisors is an integer number (24357078).

Almost surely, 2^73071231 is an apocalyptic number.

73071231 is a deficient number, since it is larger than the sum of its proper divisors (24357081).

73071231 is a wasteful number, since it uses less digits than its factorization.

73071231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24357080.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 73071231 is about 8548.1712079251. The cubic root of 73071231 is about 418.0698108411.

Adding to 73071231 its reverse (13217037), we get a palindrome (86288268).

The spelling of 73071231 in words is "seventy-three million, seventy-one thousand, two hundred thirty-one".