215255716600 has 96 divisors (see below), whose sum is σ = 522428526720. Its totient is φ = 82327259520.

The previous prime is 215255716591. The next prime is 215255716601. The reversal of 215255716600 is 6617552512.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215255716601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14652859 + ... + 14667541.

It is an arithmetic number, because the mean of its divisors is an integer number (5441963820).

Almost surely, 2^215255716600 is an apocalyptic number.

215255716600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215255716600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261214263360).

215255716600 is an abundant number, since it is smaller than the sum of its proper divisors (307172810120).

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

215255716600 is a wasteful number, since it uses less digits than its factorization.

215255716600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17909 (or 17900 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 215255716600 in words is "two hundred fifteen billion, two hundred fifty-five million, seven hundred sixteen thousand, six hundred".