71221085 has 16 divisors (see below), whose sum is σ = 92225280. Its totient is φ = 52488000.

The previous prime is 71221081. The next prime is 71221091. The reversal of 71221085 is 58012217.

It is not a de Polignac number, because 71221085 - 2² = 71221081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71221081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48086 + ... + 49544.

It is an arithmetic number, because the mean of its divisors is an integer number (5764080).

Almost surely, 2^71221085 is an apocalyptic number.

It is an amenable number.

71221085 is a deficient number, since it is larger than the sum of its proper divisors (21004195).

71221085 is a wasteful number, since it uses less digits than its factorization.

71221085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 71221085 is about 8439.2585574800. The cubic root of 71221085 is about 414.5111289848.

The spelling of 71221085 in words is "seventy-one million, two hundred twenty-one thousand, eighty-five".