71322211031 has 4 divisors (see below), whose sum is σ = 74423176752. Its totient is φ = 68221245312.

The previous prime is 71322211019. The next prime is 71322211033. The reversal of 71322211031 is 13011222317.

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 71322211031 - 2¹⁰ = 71322210007 is a prime.

It is a super-2 number, since 2×71322211031² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 3100965697 = 71322211031 / (7 + 1 + 3 + 2 + 2 + 2 + 1 + 1 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71322210988 and 71322211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71322211033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550482826 + ... + 1550482871.

It is an arithmetic number, because the mean of its divisors is an integer number (18605794188).

Almost surely, 2^71322211031 is an apocalyptic number.

71322211031 is a deficient number, since it is larger than the sum of its proper divisors (3100965721).

71322211031 is a wasteful number, since it uses less digits than its factorization.

71322211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100965720.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 71322211031 its reverse (13011222317), we get a palindrome (84333433348).

The spelling of 71322211031 in words is "seventy-one billion, three hundred twenty-two million, two hundred eleven thousand, thirty-one".