71447422 has 4 divisors (see below), whose sum is σ = 107171136. Its totient is φ = 35723710.

The previous prime is 71447417. The next prime is 71447477. The reversal of 71447422 is 22474417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22474417 = 7 ⋅3210631.

It is a super-2 number, since 2×71447422² = 10209468220892168, which contains 22 as substring.

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 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 as a sum of consecutive naturals, namely, 17861854 + ... + 17861857.

It is an arithmetic number, because the mean of its divisors is an integer number (26792784).

Almost surely, 2^71447422 is an apocalyptic number.

71447422 is a deficient number, since it is larger than the sum of its proper divisors (35723714).

71447422 is a wasteful number, since it uses less digits than its factorization.

71447422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35723713.

The product of its digits is 12544, while the sum is 31.

The square root of 71447422 is about 8452.6576885616. The cubic root of 71447422 is about 414.9497631162.

The spelling of 71447422 in words is "seventy-one million, four hundred forty-seven thousand, four hundred twenty-two".