71222013 has 12 divisors (see below), whose sum is σ = 108291040. Its totient is φ = 44982216.

The previous prime is 71221991. The next prime is 71222023. The reversal of 71222013 is 31022217.

It is not a de Polignac number, because 71222013 - 2⁸ = 71221757 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 (71222023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208081 + ... + 208422.

Almost surely, 2^71222013 is an apocalyptic number.

It is an amenable number.

71222013 is a deficient number, since it is larger than the sum of its proper divisors (37069027).

71222013 is a wasteful number, since it uses less digits than its factorization.

71222013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416528 (or 416525 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 71222013 is about 8439.3135384343. The cubic root of 71222013 is about 414.5129293162.

The spelling of 71222013 in words is "seventy-one million, two hundred twenty-two thousand, thirteen".