215800330740736 has 99 divisors (see below), whose sum is σ = 501828578192097. Its totient is φ = 92484445777920.

The previous prime is 215800330740697. The next prime is 215800330740751. The reversal of 215800330740736 is 637047033008512.

The square root of 215800330740736 is 14690144.

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

It can be written as a sum of positive squares in only one way, i.e., 5499287643136 + 210301043097600 = 2345056^2 + 14501760^2 .

It is a super-2 number, since 2×215800330740736² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215800330740736.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3290559466 + ... + 3290625046.

Almost surely, 2^{215800330740736} is an apocalyptic number.

215800330740736 is the 14690144-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215800330740736

215800330740736 is an abundant number, since it is smaller than the sum of its proper divisors (286028247451361).

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

215800330740736 is an frugal number, since it uses more digits than its factorization.

215800330740736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131196 (or 65590 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 49.

215800330740736 divided by its sum of digits (49) gives a square (4404088382464 = 2098592²).

The spelling of 215800330740736 in words is "two hundred fifteen trillion, eight hundred billion, three hundred thirty million, seven hundred forty thousand, seven hundred thirty-six".