71223233231 has 4 divisors (see below), whose sum is σ = 71238558000. Its totient is φ = 71207908464.

The previous prime is 71223233209. The next prime is 71223233233. The reversal of 71223233231 is 13233232217.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13233232217 = 4337 ⋅3051241.

It is a cyclic number.

It is not a de Polignac number, because 71223233231 - 2²⁶ = 71156124367 is a prime.

It is a super-2 number, since 2×71223233231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71223233194 and 71223233203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71223233233) 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, 7655411 + ... + 7664708.

It is an arithmetic number, because the mean of its divisors is an integer number (17809639500).

Almost surely, 2^71223233231 is an apocalyptic number.

71223233231 is a deficient number, since it is larger than the sum of its proper divisors (15324769).

71223233231 is a wasteful number, since it uses less digits than its factorization.

71223233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15324768.

The product of its digits is 9072, while the sum is 29.

Adding to 71223233231 its reverse (13233232217), we get a palindrome (84456465448).

The spelling of 71223233231 in words is "seventy-one billion, two hundred twenty-three million, two hundred thirty-three thousand, two hundred thirty-one".