71222613 has 16 divisors (see below), whose sum is σ = 118396416. Its totient is φ = 36998640.

The previous prime is 71222611. The next prime is 71222629. The reversal of 71222613 is 31622217.

It is not a de Polignac number, because 71222613 - 2¹ = 71222611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71222611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153931 + ... + 154392.

It is an arithmetic number, because the mean of its divisors is an integer number (7399776).

Almost surely, 2^71222613 is an apocalyptic number.

It is an amenable number.

71222613 is a deficient number, since it is larger than the sum of its proper divisors (47173803).

71222613 is a wasteful number, since it uses less digits than its factorization.

71222613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308344.

The product of its digits is 1008, while the sum is 24.

The square root of 71222613 is about 8439.3490862744. The cubic root of 71222613 is about 414.5140933152.

The spelling of 71222613 in words is "seventy-one million, two hundred twenty-two thousand, six hundred thirteen".