71500223858 has 18 divisors (see below), whose sum is σ = 124765213743. Its totient is φ = 30641818620.

The previous prime is 71500223849. The next prime is 71500223867. The reversal of 71500223858 is 85832200517.

It is an interprime number because it is at equal distance from previous prime (71500223849) and next prime (71500223867).

It can be written as a sum of positive squares in only one way, i.e., 35750111929 + 35750111929 = 189077^2 + 189077^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=189077.

It is a super-2 number, since 2×71500223858² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2633573 + ... + 2660583.

Almost surely, 2^71500223858 is an apocalyptic number.

71500223858 is a deficient number, since it is larger than the sum of its proper divisors (53264989885).

71500223858 is an frugal number, since it uses more digits than its factorization.

71500223858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54038 (or 27020 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 71500223858 in words is "seventy-one billion, five hundred million, two hundred twenty-three thousand, eight hundred fifty-eight".