215245144700 has 144 divisors (see below), whose sum is σ = 504102735360. Its totient is φ = 79479966720.

The previous prime is 215245144651. The next prime is 215245144711. The reversal of 215245144700 is 7441542512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27218147 + ... + 27226053.

It is an arithmetic number, because the mean of its divisors is an integer number (3500713440).

Almost surely, 2^215245144700 is an apocalyptic number.

215245144700 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 215245144700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252051367680).

215245144700 is an abundant number, since it is smaller than the sum of its proper divisors (288857590660).

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

215245144700 is a wasteful number, since it uses less digits than its factorization.

215245144700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244 (or 8237 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The spelling of 215245144700 in words is "two hundred fifteen billion, two hundred forty-five million, one hundred forty-four thousand, seven hundred".