215992562500 has 315 divisors, whose sum is σ = 562611372701. Its totient is φ = 72501000000.

The previous prime is 215992562483. The next prime is 215992562503. The reversal of 215992562500 is 5265299512.

The square root of 215992562500 is 464750.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 17 ways, for example, as 36155501316 + 179837061184 = 190146^2 + 424072^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215992562503) by changing a digit.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 16614812494 + ... + 16614812506.

Almost surely, 2^215992562500 is an apocalyptic number.

215992562500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

215992562500 is the 464750-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215992562500

215992562500 is an abundant number, since it is smaller than the sum of its proper divisors (346618810201).

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

215992562500 is an frugal number, since it uses more digits than its factorization.

215992562500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 215992562500 in words is "two hundred fifteen billion, nine hundred ninety-two million, five hundred sixty-two thousand, five hundred".