215281925712 has 300 divisors, whose sum is σ = 732310355700. Its totient is φ = 60873265152.

The previous prime is 215281925699. The next prime is 215281925723. The reversal of 215281925712 is 217529182512.

It is a happy number.

215281925712 is a `hidden beast` number, since 21 + 52 + 8 + 1 + 9 + 2 + 571 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44064727056 + 171217198656 = 209916^2 + 413784^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6142414 + ... + 6177362.

It is an arithmetic number, because the mean of its divisors is an integer number (2441034519).

Almost surely, 2^215281925712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215281925712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366155177850).

215281925712 is an abundant number, since it is smaller than the sum of its proper divisors (517028429988).

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

215281925712 is a wasteful number, since it uses less digits than its factorization.

215281925712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35080 (or 35058 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The spelling of 215281925712 in words is "two hundred fifteen billion, two hundred eighty-one million, nine hundred twenty-five thousand, seven hundred twelve".