71322151 has 4 divisors (see below), whose sum is σ = 71835400. Its totient is φ = 70808904.

The previous prime is 71322137. The next prime is 71322161. The reversal of 71322151 is 15122317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71322151 - 2¹⁷ = 71191079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71322101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256416 + ... + 256693.

It is an arithmetic number, because the mean of its divisors is an integer number (17958850).

Almost surely, 2^71322151 is an apocalyptic number.

71322151 is a deficient number, since it is larger than the sum of its proper divisors (513249).

71322151 is a wasteful number, since it uses less digits than its factorization.

71322151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513248.

The product of its digits is 420, while the sum is 22.

The square root of 71322151 is about 8445.2442830270. The cubic root of 71322151 is about 414.7071064417.

Adding to 71322151 its reverse (15122317), we get a palindrome (86444468).

The spelling of 71322151 in words is "seventy-one million, three hundred twenty-two thousand, one hundred fifty-one".