71255500 has 96 divisors (see below), whose sum is σ = 168412608. Its totient is φ = 26240000.

The previous prime is 71255497. The next prime is 71255557. The reversal of 71255500 is 555217.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 705450 + ... + 705550.

It is an arithmetic number, because the mean of its divisors is an integer number (1754298).

Almost surely, 2^71255500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71255500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84206304).

71255500 is an abundant number, since it is smaller than the sum of its proper divisors (97157108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71255500 is a wasteful number, since it uses less digits than its factorization.

71255500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 71255500 is about 8441.2972936629. The cubic root of 71255500 is about 414.5778840447.

The spelling of 71255500 in words is "seventy-one million, two hundred fifty-five thousand, five hundred".