71452221 has 8 divisors (see below), whose sum is σ = 95348064. Its totient is φ = 47595600.

The previous prime is 71452219. The next prime is 71452223. The reversal of 71452221 is 12225417.

It is an interprime number because it is at equal distance from previous prime (71452219) and next prime (71452223).

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

It is not a de Polignac number, because 71452221 - 2¹ = 71452219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71452191 and 71452200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71452223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5251 + ... + 13056.

It is an arithmetic number, because the mean of its divisors is an integer number (11918508).

Almost surely, 2^71452221 is an apocalyptic number.

It is an amenable number.

71452221 is a deficient number, since it is larger than the sum of its proper divisors (23895843).

71452221 is a wasteful number, since it uses less digits than its factorization.

71452221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19611.

The product of its digits is 1120, while the sum is 24.

The square root of 71452221 is about 8452.9415590077. The cubic root of 71452221 is about 414.9590533946.

Adding to 71452221 its reverse (12225417), we get a palindrome (83677638).

The spelling of 71452221 in words is "seventy-one million, four hundred fifty-two thousand, two hundred twenty-one".