71325551 has 8 divisors (see below), whose sum is σ = 77897424. Its totient is φ = 64768320.

The previous prime is 71325517. The next prime is 71325559. The reversal of 71325551 is 15552317.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 71325551 - 2¹⁰ = 71324527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71325559) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8225 + ... + 14501.

It is an arithmetic number, because the mean of its divisors is an integer number (9737178).

Almost surely, 2^71325551 is an apocalyptic number.

71325551 is a deficient number, since it is larger than the sum of its proper divisors (6571873).

71325551 is a wasteful number, since it uses less digits than its factorization.

71325551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7321.

The product of its digits is 5250, while the sum is 29.

The square root of 71325551 is about 8445.4455773511. The cubic root of 71325551 is about 414.7136961745.

Adding to 71325551 its reverse (15552317), we get a palindrome (86877868).

The spelling of 71325551 in words is "seventy-one million, three hundred twenty-five thousand, five hundred fifty-one".