71290022 has 4 divisors (see below), whose sum is σ = 106935036. Its totient is φ = 35645010.

The previous prime is 71290007. The next prime is 71290039. The reversal of 71290022 is 22009217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22009217 = 2687 ⋅8191.

It is a self number, because there is not a number n which added to its sum of digits gives 71290022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17822504 + ... + 17822507.

It is an arithmetic number, because the mean of its divisors is an integer number (26733759).

Almost surely, 2^71290022 is an apocalyptic number.

71290022 is a deficient number, since it is larger than the sum of its proper divisors (35645014).

71290022 is a wasteful number, since it uses less digits than its factorization.

71290022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35645013.

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

The square root of 71290022 is about 8443.3418739265. The cubic root of 71290022 is about 414.6448250622.

Adding to 71290022 its reverse (22009217), we get a palindrome (93299239).

The spelling of 71290022 in words is "seventy-one million, two hundred ninety thousand, twenty-two".