71928231 has 4 divisors (see below), whose sum is σ = 95904312. Its totient is φ = 47952152.

The previous prime is 71928223. The next prime is 71928239. The reversal of 71928231 is 13282917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13282917 = 3 ⋅4427639.

It is an interprime number because it is at equal distance from previous prime (71928223) and next prime (71928239).

It is a cyclic number.

It is not a de Polignac number, because 71928231 - 2³ = 71928223 is a prime.

It is a super-2 number, since 2×71928231² = 10347340829578722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71928192 and 71928201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71928239) 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, 11988036 + ... + 11988041.

It is an arithmetic number, because the mean of its divisors is an integer number (23976078).

Almost surely, 2^71928231 is an apocalyptic number.

71928231 is a deficient number, since it is larger than the sum of its proper divisors (23976081).

71928231 is a wasteful number, since it uses less digits than its factorization.

71928231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23976080.

The product of its digits is 6048, while the sum is 33.

The square root of 71928231 is about 8481.0512909662. The cubic root of 71928231 is about 415.8784913089.

The spelling of 71928231 in words is "seventy-one million, nine hundred twenty-eight thousand, two hundred thirty-one".