71221064 has 16 divisors (see below), whose sum is σ = 139345920. Its totient is φ = 34062160.

The previous prime is 71221049. The next prime is 71221081. The reversal of 71221064 is 46012217.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 193352 + ... + 193719.

It is an arithmetic number, because the mean of its divisors is an integer number (8709120).

Almost surely, 2^71221064 is an apocalyptic number.

It is an amenable number.

71221064 is a deficient number, since it is larger than the sum of its proper divisors (68124856).

71221064 is a wasteful number, since it uses less digits than its factorization.

71221064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387100 (or 387096 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 71221064 is about 8439.2573132948. The cubic root of 71221064 is about 414.5110882444.

The spelling of 71221064 in words is "seventy-one million, two hundred twenty-one thousand, sixty-four".