71622085 has 4 divisors (see below), whose sum is σ = 85946508. Its totient is φ = 57297664.

The previous prime is 71622079. The next prime is 71622137. The reversal of 71622085 is 58022617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58022617 = 127 ⋅456871.

It can be written as a sum of positive squares in 2 ways, for example, as 24740676 + 46881409 = 4974^2 + 6847^2 .

It is a cyclic number.

It is not a de Polignac number, because 71622085 - 2⁵ = 71622053 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7162204 + ... + 7162213.

It is an arithmetic number, because the mean of its divisors is an integer number (21486627).

Almost surely, 2^71622085 is an apocalyptic number.

It is an amenable number.

71622085 is a deficient number, since it is larger than the sum of its proper divisors (14324423).

71622085 is a wasteful number, since it uses less digits than its factorization.

71622085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14324422.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 71622085 is about 8462.9832210634. The cubic root of 71622085 is about 415.2876217777.

It can be divided in two parts, 716 and 22085, that added together give a square (22801 = 151²).

The spelling of 71622085 in words is "seventy-one million, six hundred twenty-two thousand, eighty-five".