71722506 has 8 divisors (see below), whose sum is σ = 143445024. Its totient is φ = 23907500.

The previous prime is 71722501. The next prime is 71722523. The reversal of 71722506 is 60522717.

It is a sphenic number, since it is the product of 3 distinct primes.

71722506 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71722501) 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, 5976870 + ... + 5976881.

It is an arithmetic number, because the mean of its divisors is an integer number (17930628).

Almost surely, 2^71722506 is an apocalyptic number.

71722506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71722506 is a wasteful number, since it uses less digits than its factorization.

71722506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11953756.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 71722506 is about 8468.9140980411. The cubic root of 71722506 is about 415.4816220995.

The spelling of 71722506 in words is "seventy-one million, seven hundred twenty-two thousand, five hundred six".