71721422 has 8 divisors (see below), whose sum is σ = 107846400. Its totient is φ = 35772624.

The previous prime is 71721373. The next prime is 71721491. The reversal of 71721422 is 22412717.

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

It is a junction number, because it is equal to n+sod(n) for n = 71721391 and 71721400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43022 + ... + 44657.

It is an arithmetic number, because the mean of its divisors is an integer number (13480800).

Almost surely, 2^71721422 is an apocalyptic number.

71721422 is a deficient number, since it is larger than the sum of its proper divisors (36124978).

71721422 is a wasteful number, since it uses less digits than its factorization.

71721422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88090.

The product of its digits is 1568, while the sum is 26.

The square root of 71721422 is about 8468.8500990394. The cubic root of 71721422 is about 415.4795289195.

The spelling of 71721422 in words is "seventy-one million, seven hundred twenty-one thousand, four hundred twenty-two".