72165500 has 48 divisors (see below), whose sum is σ = 171950688. Its totient is φ = 26240000.

The previous prime is 72165497. The next prime is 72165523. The reversal of 72165500 is 556127.

It is a super-3 number, since 3×72165500³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72165500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1061 + ... + 12060.

It is an arithmetic number, because the mean of its divisors is an integer number (3582306).

Almost surely, 2^72165500 is an apocalyptic number.

It is an amenable number.

72165500 is an abundant number, since it is smaller than the sum of its proper divisors (99785188).

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

72165500 is a wasteful number, since it uses less digits than its factorization.

72165500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13151 (or 13139 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 72165500 is about 8495.0279575761. The cubic root of 72165500 is about 416.3352742775.

The spelling of 72165500 in words is "seventy-two million, one hundred sixty-five thousand, five hundred".